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Industrial Management & Data Systems
Emerald Article: Collaborative performance measurement in supply chain
Dimitris Papakiriakopoulos, Katerina Pramatari



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To cite this document: Dimitris Papakiriakopoulos, Katerina Pramatari, (2010),"Collaborative performance measurement in supply
chain", Industrial Management & Data Systems, Vol. 110 Iss: 9 pp. 1297 - 1318
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                                                                                                                         Collaborative
       Collaborative performance                                                                                          performance
      measurement in supply chain                                                                                        measurement
          Dimitris Papakiriakopoulos and Katerina Pramatari
        ELTRUN, Department of Management Science and Technology,                                                                        1297
         Athens University of Economics and Business, Athens, Greece
                                                                                                                  Received 11 February 2010
Abstract                                                                                                               Revised 10 April 2010
Purpose – The objective of this paper is to demonstrate the challenges when developing a common                       Accepted 19 June 2010
performance measurement system (PMS) in the context of a collaborative supply chain.
Design/methodology/approach – The paper utilizes qualitative and quantitative data from a case
study. The qualitative data refer to the assessment of collaborative performance measures based on
interviews with experts, while the quantitative data demonstrate the use of two performance measures
in a collaborative supply chain network.
Findings – The development of a collaborative PMS is a challenging task. Through the systematic
study of two significant performance measures for a supply chain, it was found that the one could not
be supported due to reliability restrictions, while the other requires the development of a complex
information system. Based on these, a discussion of specific challenges follows.
Research limitations/implications – The paper has the general case study limitations.
Practical implications – Companies operating in supply chain networks need to synchronize
existing business processes and data before the design of a new PMS. Selecting the measures and the
measurement method is not a trivial task. Important challenges reveal when dealing with, underlying
data, business processes and the evaluation method of a PMS in supply chains.
Originality/value – The management control function usually focuses on the design and
development of PMSs for a single organization. Limited knowledge exists when more than two
companies require the development of a PMS for a jointly agreed business process.
Keywords Supply chain management, Performance measurement (quality), Inventory, Partnership
Paper type Research paper


1. Introduction
The design and development of performance measurement systems (PMSs) is part of the
management control function (Simons, 2000). The field attracts the interest of
cross-discipline researchers and includes several methods and tools, which are
increasing due to the lack of an accepted, uniform applicable and consolidated theory
(Otley, 1999). Management control has the constant need to capture the efficiency and
the effectiveness of a company, and performance measurement is the actual and concrete
instrument to cover this need (Eccles, 1991). In this paper, we examine the employment
of a common PMS in the context of a complex organizational setting, namely a
collaborative network, as this is formed by a supply chain in the fast moving consumer
goods industry.
   The supply chain environment calls for collaboration between supply chain partners,
who often establish strong relationships with each other. In such a complex setting,                                 Industrial Management & Data
the quest for performance is still an open issue (Fawcett et al., 2008).                                                                    Systems
                                                                                                                                 Vol. 110 No. 9, 2010
Performance-measurement concepts and tools have been proposed to cover                                                                 pp. 1297-1318
management control needs for a single company (Kaplan and Norton, 1995; Anderson                                 q Emerald Group Publishing Limited
                                                                                                                                           0263-5577
and Young, 1999; Otley, 1999). The integrative philosophy of supply chain management                                DOI 10.1108/02635571011087400
IMDS    eliminates the boundaries of the single firm and puts emphasis on the effectiveness of the
110,9   supply chain as a whole (Bowersox and Closs, 1996; Chan et al., 2003). Relevant research
        efforts in measuring performance of supply chains focus either on the identification of
        significant performance metrics (Gunasekaran et al., 2001; Lambert and Pohlen, 2001;
        Hofman, 2004) or on the examination of the collaborative success of the supply chain
        (Corsten and Kumar, 2005; Fawcett et al., 2008). The idea of a common PMS was
1298    suggested by Holmberg (2000), who identified the fragmented measurement activities of
        a Swedish home furnishing business supply chain and proposed the use of systems
        thinking when developing PMSs. The importance of the topic has been recently
        recognized by Busi and Bititci (2006), who have indicated collaborative performance
        measurement as an issue for further research.
           The objective of this paper is to demonstrate the challenges when developing a
        common PMS in the context of a collaborative supply chain, enabled by information
        sharing practices between supplier and retailer. In doing so, we studied the collaborative
        process of store ordering and shelf replenishment. Based on the analysis of user
        requirements and interviews with experts, we concluded a set of performance measures
        to be maintained by the collaborative platform. To limit the scope of research, we further
        investigated two crucial measures (inventory level and product availability), because
        they:
            .
               reflect the operational results of the replenishment process;
            .
               require the involvement of all the trading partners; and
            .
               are highly innovative and do not contradict with existing performance measures.

        The lessons learnt when developing these measures range from technical inefficiencies
        to core management control functions of the business processes.
            In Section 2 of the paper, we briefly present the background literature of the
        performance-measurement field, addressing the pertinent research streams, the types of
        performance measures, and the role of IT and summarize relevant initiatives and case
        studies. The Section 3 describes the research methodology and the steps undertaken in
        order to design a collaborative PMS. In order to focus on the realistic application and use
        of the system, a case study of an existing collaborative supply network is described in
        Section 4, where two important performance measures are examined in detail, followed
        by the identified challenges. Finally, Section 5 concludes the paper with the study’s
        limitations and thoughts for further research.

        2. Performance measurement in supply chain
        Performance measurement is the process of quantifying the effectiveness and efficiency
        of action (Neely et al., 1995). The instrument that regularly supports the
        performance-measurement process is referred to as PMS. A PMS maintains various
        metrics (performance measures) that are used for different purposes, like supporting
        decision making and management control, evaluating the results, motivating people,
        stimulating learning, improving coordination and communication (Neely et al., 1995;
        Simons, 2000). A performance measure is information delivered to the management
        function, evaluating the efficiency and the effectiveness of a process, resource or an
        outcome. Most of the studies in the area argue that a PMS should contain financial and
        non-financial metrics (Kaplan and Norton, 1995).
Few performance frameworks have been proposed like activity-based costing                Collaborative
(Anderson and Young, 1999), the balanced scorecard (Kaplan and Norton, 1995) and              performance
performance prism (Neely et al., 2002), to facilitate the design of a PMS. Designing PMSs
is a widely discussed issue and many researchers have examined important aspects like        measurement
the linkage of strategy with the measures, balancing internal with external measures,
mapping measures to processes, etc. (Kaplan and Norton, 1995; Bourne et al., 2000;
Neely et al., 2002). The need to extend the knowledge around PMSs from the boundaries               1299
of a single firm to the level of supply chain has been suggested early in the pertinent
literature (Van Hoek, 1998; Beamon, 1999).
    Supply chain management is a multidisciplinary field and it is addressed from many
different perspectives. Otto and Kotzab (2003) through desk research identified system
dynamics, operation research, logistics, marketing, organizational theory and strategy
as relevant scientific fields to performance measurement in supply chains. These
findings are in line with the suggestions of Neely et al. (1995) who proposed that a PMS
should incorporate different perspectives, because they are of equal importance from a
management perspective. The existence of different perspectives blurs the decision
regarding what it is (or not) significant to measure in a supply chain, thus a growing, yet
important, number of performance measures has been suggested in the literature.
    At the end of the 1990s, most of the measures suggested in the area of supply chain
management were focusing on the performance of the logistics and distribution
networks. Undoubtedly, measures related to the inventory cost or lead time are
important, but provide limited and inadequate view when the level of discussion refers
to complex supply chain settings. According to Van Hoek (1998), the scope of
performance measurement in a supply chain needs to be holistic. A similar suggestion is
also provided by other scholars, who agree that an integrated approach needs to be
adopted when measuring performance in a supply chain (Bititci et al., 2000; Lambert and
Pohlen, 2001). Beamon (1999) claimed that appropriate measures in supply chain
management fall into three categories, namely resources, output and flexibility.
Gunasekaran et al. (2001) argue that performance measures should be identified into
different levels according to the decision-making process, thus the suggested measures
are strategic, tactical and operational. De Toni and Tonchia (2001) suggested that
financial and non-financial measures should be considered. In a synthetic and important
study, Gunasekaran and Kobu (2007) reviewed the pertinent literature and a number of
cases. They identified 46 different performance measures, addressing the performance
of a supply chain. They remarked that almost 50 percent of the suggested performance
measures are related to internal business processes (internal view) of a supply chain and
the remaining 50 percent refer to the customer (external view) of the supply chain.
Making the choice between the internal and the external view of a supply chain is also
associated to finding the right balance between operational efficiency and customer
responsiveness (Fisher, 1997).
    Other research efforts adopt a specific performance measurement framework
(e.g. balanced scorecard) and suggest other sets of measures. For example, Kleijnen and
Smits (2003) used balanced scorecard and through simulation they examined how
performance metrics react with environmental and managerial control factors. In the
same direction, Brewer and Speh (2000) followed the framework of balanced scorecard
to measure supply chain performance. Gunasekaran et al. (2004) proposed a framework
for performance measurement in the supply chain, incorporating several
IMDS    performance measures, like variances against budget, human resource productivity,
110,9   quality of delivered goods, etc. Depending on the supply chain activities and processes,
        measures from all many different perspectives are found in their suggested framework,
        which was further empirically validated.
           Most of the studies related to measuring performance in supply chains discuss what
        to measure and provide valuable information and guidelines for the design of the PMS.
1300    Folan and Browne (2005) reviewed the available recommendations and frameworks in
        the area of performance measurement and identified more than 30 propositions
        regarding how to build a PMS. Within the growing literature of recommendations,
        guidelines, performance measurement frameworks and suggested measures, little
        attention has been paid on case studies that would enable the validation and extraction
        of knowledge regarding the implementation and use of a PMS in the real environment.
        Hudson et al. (2001) surveyed the use of PMSs in small and medium enterprises and
        found substantial implementation barriers. The problems faced during the
        implementation of the balanced scorecard in a single firm are also reported in Ahn’s
        (2001) work. Bourne et al. (2003) were among the first who explicitly argued that the
        research stream of performance measurement is at the stage of identifying difficulties
        and pitfalls to be avoided based on practitioner experience.
           The need to bridge the gap between theory and practice has motivated the study of
        implementation issues of PMSs and frameworks (Lohman et al., 2004; Wagner and
        Kaufmann, 2004; Fernandes et al., 2006; Searcy et al., 2008). These studies point out the
        usefulness of adopting a specific performance measurement framework, but they also
        highlight important issues during the implementation. For example, Lohman et al. (2004)
        suggest that data uniformity is crucial, since different teams in the supply chain are the
        users of the single PMS.
           The discussion of implementing a PMS shifts the focus from the strategic/managerial
        perspective of performance, to the operational use and usefulness of an information
        system. The advocate work of Holmberg (2000) identified that systems thinking has an
        important role when developing PMSs in supply chains. In the same direction, Beamon
        (1999) suggested that a “system” of performance measures is required for accurate
        measurement of the supply chain. The implementation of a PMS addresses questions
        like which are the relevant data, how do available data support the selected performance
        measures, who has access to the measures, how is a measure linked to a corrective action,
        etc. Simatupang and Shidharan (2003) propose that the members of the supply chain
        should jointly agree on a PMS. Moreover, they suggest a generic process to measure
        performance in supply chains with the following steps:
           (1) design the PMS;
           (2) facilitate measurement though the utilization of a common information sharing
                and resource-allocation system;
           (3) provide incentives to the members of the supply chain; and
           (4) intensify performance, which addresses system’s maintenance though
                comparing and modifying performance measures.

        The aforementioned steps are highly related with a systems thinking approach,
        because they take into account how performance measurement affects decisions and
        participation of the members of the supply chain and in addition address the issue
of maintaining the system. The approach of Bourne et al. (2000) is also based on             Collaborative
systems thinking, as they identify three different evolving stages for a PMS, namely          performance
design, implementation and maintenance.
   Speakman et al. (1998) argue that collaboration is a dominant approach in supply          measurement
chain management aimed to gain benefits and share results among the trading partners.
Indeed, several researchers have reported that collaboration, enabled by information
sharing, can increase the performance of a supply chain (Cachon and Fisher, 2000;                   1301
Lee et al., 2000; Croson and Donohue, 2003; Pramatari and Miliotis, 2008). However, the
impact on supply chain performance also depends on the kind of information shared, the
frequency of sharing and the relationship between the trading partners (Kehoe and
Boughton, 2001), making questionable whether collaboration achieves the expected
results. Existing collaboration practices in supply chains, facilitated by information
sharing, have not yet examined the performance systematically, implying the absence of
a collaborative PMS. Most of the studies examining the impact of information sharing on
supply chain performance utilize simulation models (Chen et al., 2007), numerical and
experimental data analysis (Fu and Piplani, 2004), and surveys (Akintoye et al., 2000).
   In conclusion, the development and maintenance of a collaborative PMS has not been
discussed in the pertinent literature. Moreover, the research community has long
stressed the importance of case studies as a consolidation tool between existing theory
and practice (Lohman et al., 2004; Hudson et al., 2001). To this end, we argue that the
challenges to build a common PMS includes managerial and technological barriers that
supply chain trading partners need to overcome. Based on these, the contribution of this
work is summarized as follows:
    .
       It studies performance measurement in the supply chain based on a real case
       setting.
    .
       It focuses on the implementation issues and challenges of the PMS.
    .
       It refers to a collaborative supply chain with daily information sharing activities
       in the downstream of the supply chain.

3. Methodology
3.1 Research method
Our empirical research has been facilitated through case study research. We have,
specifically, selected an existing collaboration network comprising major product
suppliers and a retail chain. The selection of this setting was done in order to meet the
requirements of collaboration, namely trust and commitment between the trading
partners (Speakman et al., 1998; Saura et al., 2009). The collaborating members have
jointly developed a new store ordering and replenishment business process in order to
align their strategic plans and provide increased service level to the end consumers, thus
the information sharing is mainly conducted in the downstream of the supply chain.
Moreover, the daily information sharing between the participants is facilitated by the
internet and web technologies.
   After few years of operation, managers were not aware about the results achieved
through this collaborative network. The main barrier has been the absence of a PMS
measuring collaboration success (Law et al., 2009; Fawcett et al., 2008). Thus, on one
hand, the management function had designed and jointly implemented a collaborative
business process and, on the other, it was not able to fully evaluate the impact
IMDS              of the process. The decision to develop a common PMS has been facilitated by the
110,9             suggestions of Simatupang and Shidharan (2003) regarding the jointly agreement on
                  what to measure and how to measure. Approaching a common agreement between
                  multiple trading partners, regarding what to measure, few iterations are required
                  (Figure 1).
                     The scope of the collaboration and the respective PMS has been defined around the
1302              store replenishment process and the business needs associated with it. This further
                  guided the review of the literature and identification of other relevant studies (Van Hoek,
                  1998; Beamon and Ware, 1998; Lambert and Cooper, 2000). Special attention has been
                  paid to other collaborative planning, forecasting and replenishment cases within the
                  retail industry, because the selected case has been based on this framework
                  (Holmstrom et al., 2002; Seifert, 2002; Fliedner, 2003). The result was a set of candidate
                  performance measures that were found relevant to implement by all the trading
                  partners.
                     The presentation of the candidate measures to the experts paved the ground for
                  in-depth interviews and acted as the base to exchange ideas for refinement of the
                  measures. At a later step, the performance measures were examined under two
                  perspectives:
                     (1) whether a common measurement method is acceptable by the trading partners;
                         and
                     (2) whether the available data of the collaborative network can support the
                         performance measures.

                  The final step dealt with the implementation and evaluation of the performance
                  measures. Intentionally, all types of performance measures (e.g. financial and
                  non-financial) were included. In the following sections, we present in more depth the
                  two of the selected performance measures, inventory level and product availability,
                  in order to demonstrate the challenges encountered during the development and
                  evaluation of the PMS.

                     Scope of the collaborative processes                                      Relevant literature
                                                   Candidate performance measures


                                                            Review by experts
                                                            Examine feasibility


                                     Agree for a common                           Available data supports
                          No         measurement method                           performance measures         No

                                           Yes     The measure could be supported             Yes


                                                 Implement the performance measures
Figure 1.
The research
method followed                                     Evaluate performance measures
3.2 Data availability                                                                       Collaborative
Through the collaborative platform supporting the store-replenishment process, we            performance
had access to various sources of data. Below an indicative list of the available data is
presented:                                                                                  measurement
   .
      Point-of-sales data are the collection describing the sales of the store on a daily
      basis.
   .
      Orders data describe the requests placed from the store to the Central Warehouse
                                                                                                   1303
      (CWH) of the retail chain, depicting the products the store wants to replenish.
   .
      Deliveries data are the response of the CWH to the store, showing which
      products and how many items are delivered compared to what has been ordered.
   .
      Promotion plan is a calendar of the in-store promotion activities planned by the
      retailer and the supplier in collaboration for every store.
   .
      Product assortment is the list of the active products currently available at a
      specific store. Additionally, this file has information regarding the delivery
      method of a product (delivered by the CWH or direct store delivery (DSD) by the
      product supplier).
   .
      Physical store audits are based on physical visits of researchers to the store in
      order to spontaneously monitor Product Availability of selected products on the
      store shelves.

4. Empirical work
4.1 The case setting
The collaborative supply chain of the case comprises three major product suppliers (two
multinational and one national) currently offering more than 1,000 different products in
the market. The retail chain has four CWHs and approximately 200 geographically
disperse retail stores located in Greece. The collaboration was initiated by the product
suppliers, who wanted to increase the visibility in the supply chain and acquire the
benefits of information sharing. The long-time trading activities between the members
of the supply chain ensured the sharing of common goals and beliefs for the Greek
market, a high level of trust in the relationship and finally that the requirements of
collaboration are met. Although two of the product suppliers are main competitors
within important product categories (e.g. detergents and hair care) their collaboration
with the same retailer did not present any competitive threat (Figure 2).
   The decisions made in collaboration are:
    .
      What items does a store need to replenish and in what quantities?
    .
      What are the expected sales (forecasts) per product?
    .
      Should the products be replenished by the retailer’s CWH or directly by the
      supplier?
    .
      Which is the recommenced product mix for each store?
    .
      Which products to promote and in which stores?

The ordering decisions require the daily information sharing of various sources
such as: POS data, store assortment, promotion activities, etc. The role of information
technology is essential in the collaboration since large amounts of data need
IMDS                                                         Collaboration platform
110,9
                                                  Direct store delivery



1304


                                                  Retailer distribution
                                                      center (DC)

Figure 2.
The structure of the        Product                                                      Backroom    Shelf
collaborative network      suppliers                                                           Store


                        to be processes timely and accurately and delivered in a usable manner both to
                        suppliers and to the store managers.
                           A startup company, following the software-as-a-service business model, developed
                        and operated the collaboration platform. One of the service extensions was the
                        development of a PMS, as performance measurement is a necessary tool for successful
                        management (Phusavat et al., 2009).
                           Managers from all the trading partners expressed their interest in examining the
                        performance according to the objective of the collaboration, which has been “to offer
                        high service level to consumers by efficiently handling the store ordering process
                        enhanced by information sharing capabilities”. The design of the PMS should be linked
                        to the collaboration strategy, in order to:
                            .
                              demonstrate the results achieved through the new store ordering and
                              replenishment process and
                            .
                              stimulate learning on the product suppliers’ side wishing to evaluate the effect of
                              collaboration and examine the possibility of expanding the collaboration process
                              to other retail chains.

                        Moreover, the adoption of a specific performance measurement framework (e.g. balanced
                        scorecard) was found to be complex and costly, at least at the initial stage, due to the
                        narrow and structured scope of the collaboration. Therefore, it was decided to study a
                        limited number of performance measures focusing on the specific collaboration process
                        and on the responsiveness to the consumer. Relevant works in PMS design have
                        provided guidelines for the PMS of our case. Table I depicts how existing suggestions in
                        the literature have affected some design options of the specific PMS.
                           Based on discussions with the managers, we examined their motives to join this
                        collaboration effort and reconfigure the store ordering and replenishment process.
                        In particular, the trading partners had the following issues:
                            .
                               Inventory levels at the stores were not optimized, implying either overstocking or
                               out-of-stock situations, and the participants expected that they would be able to
                               handle the problem through collaboration.
Collaborative
Suggested in the literature                        Impact on the design of the PMS
                                                                                                                performance
Reflect strategic alignment (Eccles, 1991;         Understand the strategy of the collaboration as the          measurement
Kaplan and Norton, 1995; Bititci et al., 2000) tradeoff between effectiveness and responsiveness
                                                  Focus on the results of collaboration
                                                  Exclude financial performance measures at the initial
                                                  stage                                                                   1305
Monitor critical activities (Azzone et al., 1991; Focus on the store-replenishment process
Neely et al., 1995)                               Link of problematic areas with specific performance
                                                  measures
                                                  Focus at the store level of the supply chain
Measure product delivery from supplier to         The integrative view of the supply chain makes the
customer (Dixon et al., 1990)                     consumer as the only customer
                                                  Focus at the store level of the supply chain
Provide measures that all members could           Use collaboration platform to share performance                         Table I.
understand (Dixon et al., 1990)                   measures in a daily base                                      Utilizing literature
Focus on measures that customer can see           Develop performance measure that reflects the service      suggestions in the PMS
(Kaplan and Norton, 1995)                         level of the collaboration to the consumer                     design of the case


   .
       High forecast inaccuracies mean that demand forecasting could not be used for
       most of the products.
   .
       Product shelf unavailability (also referred to as out-of-shelf (OOS)) has recently
       emerged as one of the most important problems in the retail sector affecting
       revenue streams as well as consumer satisfaction.
   .
       Imperfect orders address a “weak” connection between the retailer’s central
       distribution center (DC) and he stores, implying that the DC is not able to cover the
       stores’ demand.

Creating performance measures relevant to the problematic areas leverages the
commitment of managers to participate in the design of the PMS. Table II links

Problematic area              Interested partner    Candidate performance measures

Inventory levels              Supplier-retailer     Inventory (Beamon, 1999)
                                                    Fill rate (Kleijnen and Smits, 2003)
                                                    Backorder/stockout (Beamon, 1999)
                                                    Stockout probability (Beamon, 1999)
Forecast accuracy             Supplier              Forecast accuracy (Gunasekaran et al., 2004; Fisher,
                                                    1997; Hadaya and Cassivi, 2007)
Product shelf availability    Supplier-retailer     Flexibility of service system to meet customer needs
                                                    (Gunasekaran et al., 2004)
                                                    Point of consumption product availability (Neely
                                                    et al., 1995)
Imperfect orders              Retailer              Delivery reliability performance (Gunasekaran et al.,
                                                    2004)
                                                    Response delay (Kleijnen and Smits, 2003)                            Table II.
                                                    Reliability (Neely et al., 1995)                        Problems identified and
                                                    Deliverability (Neely et al., 1995)                              the associated
                                                    On-time deliveries (Neely et al., 1995)                  performance measures
IMDS            the identified problematic areas with a set of candidate performance measures, as found
110,9           in the pertinent literature, and the partner mostly interested in the issue.
                    From a system architecture perspective, the proposed PMS is located at the top of
                the collaboration platform in order to have access to all the available information and
                be visible to the respective trading partners. The PMS was developed as a reporting
                tool based on an integrative view of the shared data sources. Depending on the
1306            employed measurement method, we distinguish the performance measures into two
                categories:
                   (1) Single performance measures are derived directly by the data sources, are
                        deterministic in nature and can be expressed though simple formulas.
                   (2) Composite performance measures extend the available data sources with other
                        parameters (e.g. probabilities, loss functions, etc.).

                Studies in performance system design do not usually include the calculation method for
                each suggested performance measure. From a system perspective, this is a major
                drawback, because the linkage between the performance measure and the available data is
                missing. In our case, defining each performance measure was necessary in order to
                proceed with the implementation of the PMS. All measures are defined at the store
                and product level. Table III provides information for the implementation of the selected
                performance measures. In order to demonstrate the challenges associated with the
                development of a common PMS, the measures selected for in-depth investigation are
                inventory level and product availability. The reasons for selecting these two measures are:
                   .  they are the most critical measures in respect to the store replenishment process;
                   .
                      they measure problematic areas identified by both the retailer and supplier
                      (Table II);
                   .
                      they increase supply chain visibility for the product supplier, because they offer
                      a view at store level on a daily basis; and
                   .
                      the former is examined as a single performance measure and the later as a
                      composite one.


                Performance
                measure         Type       Data used           Description                         Frequency

                Inventory level Single    Sales                Number of items existing in the store Daily
                                          Deliveries           for a certain product
                Forecast        Composite Forecast plans       The difference between the expected Weekly
                accuracy                  Sales                sales and the observed sales.
                                          In-store promotion   Seasonal and promotion
                                          activities           amplification of the sales are taken
                                                               into account
                Product         Composite Sales                Describes if a product is available on Daily
                availability              Inventory levels     the shelf of a store or not
Table III.                                Product assortment
A view of the                             Promotion activities
performance     Imperfect       Single    Orders               Examines if the items and quantity Daily
measures used   orders                    Deliveries           delivered meet the order of the store
The next sections describe the challenges encountered during the development and                     Collaborative
evaluation of the two performance measures.                                                           performance
4.2 Measuring inventory at the store                                                                 measurement
The inventory level of a product in a store is related with the product availability. On one
hand, if a retail store has enough product quantity stored in the backroom to face the
future consumer demand, at least within the lead time of the store replenishment cycle,                          1307
then the possibility of stock out is minimized. On the other hand, ordering and stocking
large amounts of a specific product would lead to overstocking situations.
   It would be unrealistic to count the inventory level at the end of each day for all the
products in a store. The approach to use available information and subtract a product’s
sales from the delivered quantities in order to determine the inventory level has high
inaccuracy. According to Kang and Gershwin (2005), it is very difficult to maintain perfect
inventory records at the store level due to various sources of error (e.g. shoplifting, damage
of the products during the transportation, delays in information sharing, etc.). In the
specific case, we found that inventory inaccurate records negatively affect the reliability of
inventory level as a store performance measure.
   More specifically, in order to evaluate the accuracy of the inventory level measure, we
selected nine representative stores and thoroughly examined the consistency between
sales and deliveries for all the products for a six-month period. Depending on the
delivery method, we classified the available products into three categories:
   (1) The CWH category includes the products that are delivered to the store through
        the retail CWH, i.e. retail DC, on a regular basis.
   (2) The second category is labeled DSD and includes the products delivered to the
        store directly by the supplier.
   (3) The last category (CWH/DSD) includes the products which do not meet any of
        the above classes. These products are replenished by both the CWH and the
        product supplier, in a mixture that is not known in advance, and it is subject to
        factors like demand fluctuations, stockout at the CWH, imperfect orders, etc.

Table IV illustrates the distribution among the three classes. On one hand, Store 1 is
the largest store examined, having over 5,000 different products in its assortment,
while on the other hand the smallest store (Store 9) merchandises approximately 1,500
different products. Most of the products (approximately 48 percent) are delivered


                                 Delivery method
Store             CWH                   DSD             CWH/DSD            Number of products

Store   1    2,291   (45.66%)     2,006   (39.98%)     721   (14.37%)             5,018
Store   2    1,459   (42.44%)     1,491   (43.37%)     488   (14.19%)             3,438
Store   3    2,169   (49.46%)     1,728   (39.41%)     488   (11.13%)             4,385
Store   4    2,533   (50.15%)     1,838   (36.39%)     680   (13.46%)             5,051
Store   5    1,813   (44.18%)     1,783   (43.45%)     508   (12.38%)             4,104
Store   6    1,065   (41.50%)     1,177   (45.87%)     324   (12.63%)             2,566                         Table IV.
Store   7    1,771   (43.14%)     1,770   (43.12%)     564   (13.74%)             4,105          Classification of products
Store   8    1,780   (44.82%)     1,721   (43.34%)     470   (11.84%)             3,971             based on the sales and
Store   9      735   (47.88%)       599   (39.02%)     201   (13.09%)             1,535                  inventory records
IMDS                        through the CWH, because the ordering cost is lower compared to the cost of the DSD.
110,9                       The number of products delivered directly to the store varies between 35 and
                            45 percent, depending on the store size. The remaining products (that are neither CWH
                            nor DSD) are classified under the CWH/DSD label. On average, this class represents
                            14 percent of products.
                               The collaboration platform shares on a daily basis data from the retail chain,
1308                        including deliveries and sales data. This means that the transactions referring to the
                            CWH products are timely available through the platform and, thus, in the following, we
                            look only at CWH products. We assume that the total delivered quantity (Q) should
                            always exceed the observed sales (S) for a given product and store. Consequently, we
                            adopt the holding inventory formula to calculate the inventory level as a store
                            performance measure. By definition, holding inventory is non-negative and expressed
                            by the following formula:

                                                          Holding Inventory ¼ Q 2 S $ 0                                ð1Þ

                            The percentage of records that equation (1) is violated has been examined using the
                            available data (POS and deliveries data). As Table V presents, around 9 percent of the
                            records has a negative value for the holding inventory. This “unexpected” phenomenon
                            is caused by deliveries occurring in the store and not monitored on time or at all by the
                            information system. On the other extreme, the overstocked products are around
                            5 percent, according to the available records, which is significantly high for retail
                            business. The inventory measure, relying on the available information, provides
                            unrealistic results (negative values and high percent of overstocking items), which does
                            not reflect the exact situation of the daily store inventory. However, we noticed that the
                            holding inventory value for few product categories with long life cycle, low-priced
                            products and small promotion activity (e.g. snacks and pasta) could be correctly
                            estimated. Other categories, more expensive, with high promotion activity and frequent
                            product introductions (e.g. detergents and shampoo) are on the other extreme, and it is
                            very unlike to have a reliable performance measure.
                                Real life events distort the available information regarding the inventory levels.
                            Having only 50 percent of the available records in the area of the normal levels of holding
                            inventory is an important barrier for the development of a widely acceptable
                            performance measure in the specific case. Additionally, the variability of the holding


                                      Negative holding Very low-holding   Low-holding    Normal levels of
                                         inventory        inventory        inventory    holding inventory   Overstocking
                                            (%)               (%)             (%)              (%)              (%)

                            Store 1        10.78             9.38            16.37            58.57             4.90
                            Store 2        10.56            14.05            28.10            43.98             3.31
                            Store 3         7.70            13.32            25.68            48.07             5.23
                            Store 4        13.42            11.69            18.56            48.91             7.42
                            Store 5         7.7             10.98            26.14            50.07             5.64
                            Store 6         9.11            15.21            34.18            36.76             4.74
Table V.                    Store 7         6.32            12.59            30.89            44.77             5.43
Inaccurate records of the   Store 8         8.15            12.75            27.81            45.63             5.67
holding inventory           Store 9        14.55            16.60            32.65            33.76             2.44
inventory changes between the stores. To this end, the development of a performance                 Collaborative
measure related to inventory level at the store could not be supported due to information            performance
quality restrictions. Possible options to gather a more realistic inventory view could be
based on the following:                                                                             measurement
   .
      employment of multiple inventory measurement methods for different stores and
      product categories;
   .
      use of probabilistic models to calculate inventory shrinkages; and                                       1309
   .
      use of radio-frequency identification (RFID) technology.

4.3 Measuring product availability at the store
The term product availability implies that a product is accessible by the consumer on the
shelf of a retail outlet. However, empirical research has shown that it is not unusual
that the product is not on the shelf when a consumer is looking for it, leading to lost sales
and decreasing consumer loyalty. According to Gruen et al. (2002), the OOS rate is close
to 8.3 percent worldwide, which is considered very high given that an acceptable level
(determined by suppliers and retailers) would be less than 2 percent. Additionally, OOS
rates of promoted items are much higher, affecting the promotional effectiveness
(Gruen et al., 2002). In our case, the suppliers and the retail chain have found such a
performance measure directly related to the objective of collaboration, since it depicts
the responsiveness of the collaborative supply chain towards the end customer.
    Currently, the measurement of OOS is utilized through physical store audits,
conducted by the retailer or the product suppliers. However, the high cost of measuring
product availability and the dynamically changing states of the shelves are the major
barriers for acquiring timely information and understanding the problem in detail.
Company Alpha, as the owner of the collaboration platform had decided to implement
a method for the evaluation of product availability at the store utilizing the available
data. After thorough examination of the available computational methods,
a sophisticated heuristic rule-based method was proposed in order to automatically
detect products missing from the shelf. The method has been based on knowledge
engineering principles and more than 100 different rules developed through a
data-mining process (Papakiriakopoulos et al., 2009). Using the same rules on a daily
basis and for all the stores of the retail chain, it is possible to detect products missing
from the shelf. A sample of rules used for the automatic detection of OOS products
is depicted in Table VI.


                                                                     Products merchandized
RuleID Rule body                                         Accuracy             (%)

Rule 21 (LastPosDays $ 3) AND (day ¼ ‘Wednesday’)
        AND (StoreSize ¼ ‘Large’) AND
        (SD_DailyPosAvg # 2.82) AND
        (FastMovingIdx . 0.76)                              0.82              0.4
Rule 43 (LastPosDays . 6) AND (SD_PosAvg . 7.9) AND
        (day ¼ ‘Tuesday’)                                   0.42              0.1                             Table VI.
Rule 47 (TypeOfProducts ¼ ‘ADV’) AND (posavg . 1.9)                                             Indicative rules used for
        AND (Last_Order . 12) AND                                                                     detecting products
        (Mean_Order_quantity , 6)                           0.91              0.01                missing from the shelf
IMDS                    Although the rules have been found to accurately detect OOS products, they have an
                        important drawback, because they cannot cover all the different cases of products
110,9                   missing from the shelf. For example, Rule 21 characterizes as OOS the products that
                        have not sold for the last three days (LastPosDays . ¼ 3), the day of detection is
                        Wednesday (day ¼ “Wednesday”), the area of interest is only the large stores of the
                        retail chain (Store_Size ¼ “Large”), the standard deviation of sales only for Wednesday
1310                    should be low (SD_DailyPosAvg , ¼ 2.82) and finally the products are fast-moving
                        items (FastMovingIdx . 0.76). This rule has relatively high detection accuracy
                        (82 percent) but refers only to a small proportion of the total OOS occurring daily in the
                        store. Thus, on one hand, the collaborative network acquired an accurate mechanism for
                        measuring product availability; on the other hand, the mechanism only partially
                        monitors the products merchandized by the store.
                           However, a linear correlation has been found between the OOS rate and the number of
                        products the system detects as OOS per day. The higher OOS rate a store has, the more
                        OOS alarms it gets. Table VII presents the number of products that are active in a store,
                        the average OOS rate, as estimated by physical store audits, and the average number of
                        products the detection mechanism reports as OOS per day. As expected, stores with a
                        greater OOS problem receive relatively higher counts by the detection mechanism.
                           The performance measure for estimating product availability was found very
                        interesting by the participants, but the measurement method employed was rather
                        complicated. Based on the available data of the collaboration platform, an intelligent
                        information system was designed and developed but this had limited detection
                        capabilities for the products missing from the shelf. Nevertheless, the employed
                        mechanism correctly detected the retail stores encountering the biggest OOS problem,
                        thus offering a reasonable and uniform method to product suppliers and the retailer
                        to agree on the stores having the lower product availability and to start planning
                        corrective actions.

                        4.4 Implications and discussion
                        The available case setting revealed some aspects in the area of performance
                        measurement. The need for a universal framework for selecting performance measures
                        in supply chains, as identified in the presented case, validates Beamon and Ware’s (1998)
                        prior research. The challenges identified through the effort to build a common PMS
                        could be grouped into three broad categories namely:
                            (1) data management;
                            (2) business-process management; and
                            (3) collaboration.

                                                     Real world                         Detection mechanism
                                    Products monitored     Average OOS rate (%)     Average daily alarmed products

                        Store   1         4.548                    8.91                           78
                        Store   2         3.401                   11.70                           94
Table VII.              Store   3         3.120                   12.12                          115
Relationship between    Store   4         4.079                    8.53                           82
OOS and alarms by the   Store   5         4.634                    9.60                          103
detection mechanism     Store   6         2.870                   12.47                          117
Data management. Data management includes all the actions performed during the life            Collaborative
cycle of shared data. While the importance of information sharing has been recognized in        performance
the literature (Yu et al., 2001), in practice information quality is a major obstacle.
Information quality has been studied in the context of planning supply chain activities        measurement
and some researchers have expressed the opinion that information quality is positively
related with the performance of the supply chain (Petersen et al., 2005; Simchi-Levi et al.,
2008). Previous studies in the upstream supply chain have stressed the benefits of timely              1311
(Bourland et al., 1996; Karaesmen et al., 2004) and complete (Chu and Lee, 2006)
information sharing. In our case, we examined a single performance measure (inventory
level at the store), at the downstream supply chain. The data sources (sales and
deliveries) were considered as timely and complete. Sales data were collected though the
POS scanning infrastructure of the retail stores and the deliveries data were provided by
the warehouse management system that controls the operations of the retail DC.
However, their mix failed to accurately estimate the inventory levels at the store, due to
shrinkage and other factors. The role of new technologies, and in particular RFID
technology, could be a key enabler to improve information quality in an automated
manner (Kelepouris et al., 2007; Lee and Park, 2008).
   The provision of inaccurate performance measures is associated with incorrect
decisions. Managers utilize performance measures to quickly identify areas of
improvement (Neely et al., 1995), therefore the provision of unreliable performance
information, would eventually initiate unnecessary corrective actions and as a
consequence the managers lose trust in the PMS. The role of trust is tightly linked with
performance in inter-organizational settings (Zaheer et al., 1998), thus the quality of
information provided by the PMS could hinder the performance if neither reliability
checks nor quality control processes are considered during the implementation.
   Business-process management. The examined performance measures did not only
reflect the quality of the shared data, but also support decisions on business processes
that are not part of collaboration. For example, the shelf layout is subject to the category
management business process, which is not covered by the collaboration platform
presented in our case. Hence, the performance measure of product availability
significantly depends on decisions made during the category management process.
The complex nature of supply chain operations is an important challenge to overcome
when implementing such PMSs (Fawcett et al., 2008). Following a “divide and conquer”
approach, as suggested by systems thinking, to implement the PMS is contradictory
with the integrative philosophy of managing a supply chain. Nevertheless, it was found
to be a good managerial learning process, because it motivated managers to re-evaluate
the scope of collaboration and identify existing business processes that need to be
supported by the collaboration platform. To this end, the development of the
measurement system itself can enhance the collaborative strategic management process
by challenging the assumptions and the existing strategy (Bourne et al., 2000), providing
growth prospects though continuous improvement programs. Prior works have stressed
the importance of performance measurement to motivate people and stimulate learning
in the organizations (Kaplan and Norton, 1995). In the presented case, the lessons
acquired through performance measurement made collaborating partners re-evaluate
the collaboration objectives, shift the focus from the timely information sharing to
information quality and re-examine the scope of collaboration through the incorporation
of new business processes.
IMDS       Collaboration. Most of the benefits identified on the product supplier side derived
110,9   from the practice of information sharing. Based on collaboration and information
        sharing, the trading partners reported better performance of decisions in the store-
        replenishment process (Lee and Whang, 1999). The availability of daily OOS alarms to
        suppliers per retail store has been considered as valuable information since it facilitates
        supply chain visibility and allows for rapid corrective actions. From the retailer’s
1312    perspective, this information is useful only because it provides a uniform approach to
        estimate the true OOS rate, thus is utilized as a benchmarking process for the stores.
        We believe that this is the main opportunity when developing common PMSs: while
        every partner activates its individual mechanisms and identifies areas of improvement
        in a different way, all of them share the common objective of collaboration.
           Collaboration in the supply chain is a key enabling factor for the implementation of a
        PMS. Bourne (2005) examined 16 different performance measurement cases at different
        levels of design and implementation. His findings suggest that the top management
        support is a key factor to proceed with the implementation phase, although in his study,
        only two cases finally managed to implement performance measures. The initial definition
        of collaboration (Speakman et al., 1998) implies the commitment of the trading partners,
        thus it is expected that a PMS referring to a collaboration effort is more likely to be
        implemented, as happened to our case. It is also important that non-financial performance
        measures are more likely to be part of the collaborative PMS for the next two reasons:
           (1) Financial measures are difficult to be agreed and designed because the
                resources are common and the cost centers are different for the trading partners.
           (2) Most of the managers want to identify the alignment between the jointly agreed
                objectives of collaboration and the results achieved.

        Common implementation problems, as already discussed in the literature, have been
        found in the presented case. Lack of a structured development process of the PMS (Hudson
        et al., 2001) and increased effort to collect data and support composite performance
        measures (Ahn, 2001) have been barriers to the implementation effort. However,
        resistance to measurement efforts (Bourne et al., 2000) and top management commitment
        (Neely et al., 1995) have not been substantial problems to the implementation of the
        presented PMS.
           At the early 1980s, a PMS was close to the budgetary control and aligned with
        accounting procedures (Traditional PMS). Ten years later, the management thinking
        approach broadened the view of performance measurement and initiated the discussion
        regarding strategic alignment of measuring performance, improvement though
        measurement, focus on the quality, etc. The role of supply chain management enabled
        by information technology allowed the discussion about an integrative approach on
        more complex structures and how to manage them though performance measurement
        (supply chain PMS). We could say that the case presented in this paper discusses what
        we could call a collaborative PMS, making performance measurement a central issue in
        managing collaboration (collaborative PMS). Table VIII summarizes the difference
        among the three classes of PMS.

        5. Conclusions
        This paper discusses the development of a PMS in a collaborative context. Although
        companies in supply chain networks have the constant need to measure performance,
Collaborative
             Traditional PMS         Supply chain PMS             Collaborative PMS
                                                                                                  performance
Measuring    Identify performance   Identify performance          Measures derived from the      measurement
             measures               dimensions according to the   objective of collaboration
                                    supply chain structure
Number of   Variable number of      Increased number of           Limited number of
measures    performance measures    performance measures to       performance measures                      1313
                                    cover all the dimensions
Measures    Bias towards financial   Focus on financial and non-    Focus on non-financial
usage       measures                financial measures             measures
Motives to  Measure to improve      Measure to understand,        Measure to understand the
measure                             identify areas and improve    success of collaboration
Approach    Accounting              Management thinking           Systems thinking
                                    System thinking
Data        Significant effort to    Very significant effort to     Information sharing enabled
management identify and gather data identify and gather data      by technology
Data issues Gather available data   Integrate available data      Information quality                     Table VIII.
Scope       Firm                    Firm and trading partners     Collaborating partners        Classification of PMSs



the corresponding systems are in practice isolated. The existing knowledge in the area
of performance measurement needs to be extended to cover the needs of a supply chain,
where collaboration and information sharing practices integrate the participating
companies into a single and integrative unit.
   The challenges we found during the development of a common PMS derive from data
management, business process management and collaboration issues. The field is open
in the identification of further challenges, opportunities and barriers. The proper use
of IT is essential in the development of a common PMS, but we argue that the most
important issues are context specific and related to the practical implementation.
   There are several limitations in this study; many are associated with the data used
from the collaboration platform and others with the selected case setting. The first
problem relates to the gap between the available data and the business processes
supported by the collaboration network. Although the store-replenishment process is
common for all the trading partners, the data used to support the selected performance
measures have been found to be restrictive against the requirements of a common PMS,
due to the complex nature of the setting (e.g. many participants, different information
sources, etc.). Here, we can argue that the measures examined were in the area of a
feasible solution for the specific case. Nevertheless, the challenges we have faced can be
relevant to similar cases as well, where companies collaborate and share information to
accomplish a specific business objective and not to build a common PMS, which is
usually underestimated as a management function.
   The second problem deals with the limitations posed by examining only two
performance measures. The examination of other performance measures might have led
to slightly different results. As with any case study, the findings cannot easily be
generalized to other empirical settings of relevant industrial sectors (e.g. pharmaceutics,
cosmetics, etc.). Since these industries are sharing the same supply chain management
principles, though, it is likely that they face similar challenges when developing a PMS.
However, further investigation is required and a cross-industry comparative research
might reveal a set of common challenges.
IMDS       Up to now, the knowledge for implementing and maintaining a common PMS is
110,9   limited. With this work, we demonstrate some challenges related to the topic. Further
        research is required for the identification of additional challenges, opportunities and
        barriers though case studies, where collaboration and information sharing are the key
        components of business-process management. Selecting common performance
        measures is also a challenging area because it deals with important management and
1314    organizational issues like negotiations, strategic fit and alignment. Finally, the
        acceptance of a common PMS is an important issue, because it is expected to facilitate
        benchmarking within a collaborative network, allowing direct comparisons of existing
        bilateral relationships of the trading partners.

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IMDS    Further reading
110,9   Slack, N. (1991), The Manufacturing Advantage, Mercury Books, London.

        About the authors
        Dimitris Papakiriakopoulos holds a BSc in Informatics and MSc in Information Systems from
        Athens University of Economics and Business (AUEB), and a PhD in Information Systems and
1318    Artificial Intelligence also from AUEB. He is a Senior Research Officer at the ELTRUN Research
        Centre at AUEB. He has extensive research experience, having been involved in various research
        European projects for the last ten years and has more than 15 publications in scientific journals
        and international conferences. His research interests are on the area of machine learning methods,
        supply chain management and performance improvement though the intervention of technology.
        Dimitris Papakiriakopoulos is the corresponding author and can be contacted at: dpap@aueb.gr
            Katerina Pramatari is an Assistant Professor at the Department of Management Science and
        Technology of the AUEB. She holds a BSc in Informatics and MSc in Information Systems from
        AUEB, and a PhD in Information Systems and Supply Chain Management also from AUEB. She
        has won both business and academic distinctions and has been granted eight state and school
        scholarships. Her research and teaching areas are supply and demand chain collaboration,
        traceability and RFID, e-procurement, e-business integration and electronic services. She has
        published more than 60 papers in edited books, international conferences and scientific journals,
        including Decision Support Systems, Journal of Information Systems, Journal of Information
        Technology, The European Journal of OR, Computers and OR, Supply Chain Management:
        An International Journal, and International Journal of Information Management.




        To purchase reprints of this article please e-mail: reprints@emeraldinsight.com
        Or visit our web site for further details: www.emeraldinsight.com/reprints

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Collaborative performance

  • 1. Industrial Management & Data Systems Emerald Article: Collaborative performance measurement in supply chain Dimitris Papakiriakopoulos, Katerina Pramatari Article information: To cite this document: Dimitris Papakiriakopoulos, Katerina Pramatari, (2010),"Collaborative performance measurement in supply chain", Industrial Management & Data Systems, Vol. 110 Iss: 9 pp. 1297 - 1318 Permanent link to this document: http://dx.doi.org/10.1108/02635571011087400 Downloaded on: 14-07-2012 References: This document contains references to 71 other documents To copy this document: permissions@emeraldinsight.com This document has been downloaded 1871 times since 2010. * Users who downloaded this Article also downloaded: * Charles Inskip, Andy MacFarlane, Pauline Rafferty, (2010),"Organising music for movies", Aslib Proceedings, Vol. 62 Iss: 4 pp. 489 - 501 http://dx.doi.org/10.1108/00012531011074726 Laura C. Engel, John Holford, Helena Pimlott-Wilson, (2010),"Effectiveness, inequality and ethos in three English schools", International Journal of Sociology and Social Policy, Vol. 30 Iss: 3 pp. 140 - 154 http://dx.doi.org/10.1108/01443331011033337 Aryati Bakri, Peter Willett, (2011),"Computer science research in Malaysia: a bibliometric analysis", Aslib Proceedings, Vol. 63 Iss: 2 pp. 321 - 335 http://dx.doi.org/10.1108/00012531111135727 Access to this document was granted through an Emerald subscription provided by INDIAN INSTITUTE OF MANAGEMENT AT LUCKNOW For Authors: If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service. Information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.com With over forty years' experience, Emerald Group Publishing is a leading independent publisher of global research with impact in business, society, public policy and education. In total, Emerald publishes over 275 journals and more than 130 book series, as well as an extensive range of online products and services. Emerald is both COUNTER 3 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. *Related content and download information correct at time of download.
  • 2. The current issue and full text archive of this journal is available at www.emeraldinsight.com/0263-5577.htm Collaborative Collaborative performance performance measurement in supply chain measurement Dimitris Papakiriakopoulos and Katerina Pramatari ELTRUN, Department of Management Science and Technology, 1297 Athens University of Economics and Business, Athens, Greece Received 11 February 2010 Abstract Revised 10 April 2010 Purpose – The objective of this paper is to demonstrate the challenges when developing a common Accepted 19 June 2010 performance measurement system (PMS) in the context of a collaborative supply chain. Design/methodology/approach – The paper utilizes qualitative and quantitative data from a case study. The qualitative data refer to the assessment of collaborative performance measures based on interviews with experts, while the quantitative data demonstrate the use of two performance measures in a collaborative supply chain network. Findings – The development of a collaborative PMS is a challenging task. Through the systematic study of two significant performance measures for a supply chain, it was found that the one could not be supported due to reliability restrictions, while the other requires the development of a complex information system. Based on these, a discussion of specific challenges follows. Research limitations/implications – The paper has the general case study limitations. Practical implications – Companies operating in supply chain networks need to synchronize existing business processes and data before the design of a new PMS. Selecting the measures and the measurement method is not a trivial task. Important challenges reveal when dealing with, underlying data, business processes and the evaluation method of a PMS in supply chains. Originality/value – The management control function usually focuses on the design and development of PMSs for a single organization. Limited knowledge exists when more than two companies require the development of a PMS for a jointly agreed business process. Keywords Supply chain management, Performance measurement (quality), Inventory, Partnership Paper type Research paper 1. Introduction The design and development of performance measurement systems (PMSs) is part of the management control function (Simons, 2000). The field attracts the interest of cross-discipline researchers and includes several methods and tools, which are increasing due to the lack of an accepted, uniform applicable and consolidated theory (Otley, 1999). Management control has the constant need to capture the efficiency and the effectiveness of a company, and performance measurement is the actual and concrete instrument to cover this need (Eccles, 1991). In this paper, we examine the employment of a common PMS in the context of a complex organizational setting, namely a collaborative network, as this is formed by a supply chain in the fast moving consumer goods industry. The supply chain environment calls for collaboration between supply chain partners, who often establish strong relationships with each other. In such a complex setting, Industrial Management & Data the quest for performance is still an open issue (Fawcett et al., 2008). Systems Vol. 110 No. 9, 2010 Performance-measurement concepts and tools have been proposed to cover pp. 1297-1318 management control needs for a single company (Kaplan and Norton, 1995; Anderson q Emerald Group Publishing Limited 0263-5577 and Young, 1999; Otley, 1999). The integrative philosophy of supply chain management DOI 10.1108/02635571011087400
  • 3. IMDS eliminates the boundaries of the single firm and puts emphasis on the effectiveness of the 110,9 supply chain as a whole (Bowersox and Closs, 1996; Chan et al., 2003). Relevant research efforts in measuring performance of supply chains focus either on the identification of significant performance metrics (Gunasekaran et al., 2001; Lambert and Pohlen, 2001; Hofman, 2004) or on the examination of the collaborative success of the supply chain (Corsten and Kumar, 2005; Fawcett et al., 2008). The idea of a common PMS was 1298 suggested by Holmberg (2000), who identified the fragmented measurement activities of a Swedish home furnishing business supply chain and proposed the use of systems thinking when developing PMSs. The importance of the topic has been recently recognized by Busi and Bititci (2006), who have indicated collaborative performance measurement as an issue for further research. The objective of this paper is to demonstrate the challenges when developing a common PMS in the context of a collaborative supply chain, enabled by information sharing practices between supplier and retailer. In doing so, we studied the collaborative process of store ordering and shelf replenishment. Based on the analysis of user requirements and interviews with experts, we concluded a set of performance measures to be maintained by the collaborative platform. To limit the scope of research, we further investigated two crucial measures (inventory level and product availability), because they: . reflect the operational results of the replenishment process; . require the involvement of all the trading partners; and . are highly innovative and do not contradict with existing performance measures. The lessons learnt when developing these measures range from technical inefficiencies to core management control functions of the business processes. In Section 2 of the paper, we briefly present the background literature of the performance-measurement field, addressing the pertinent research streams, the types of performance measures, and the role of IT and summarize relevant initiatives and case studies. The Section 3 describes the research methodology and the steps undertaken in order to design a collaborative PMS. In order to focus on the realistic application and use of the system, a case study of an existing collaborative supply network is described in Section 4, where two important performance measures are examined in detail, followed by the identified challenges. Finally, Section 5 concludes the paper with the study’s limitations and thoughts for further research. 2. Performance measurement in supply chain Performance measurement is the process of quantifying the effectiveness and efficiency of action (Neely et al., 1995). The instrument that regularly supports the performance-measurement process is referred to as PMS. A PMS maintains various metrics (performance measures) that are used for different purposes, like supporting decision making and management control, evaluating the results, motivating people, stimulating learning, improving coordination and communication (Neely et al., 1995; Simons, 2000). A performance measure is information delivered to the management function, evaluating the efficiency and the effectiveness of a process, resource or an outcome. Most of the studies in the area argue that a PMS should contain financial and non-financial metrics (Kaplan and Norton, 1995).
  • 4. Few performance frameworks have been proposed like activity-based costing Collaborative (Anderson and Young, 1999), the balanced scorecard (Kaplan and Norton, 1995) and performance performance prism (Neely et al., 2002), to facilitate the design of a PMS. Designing PMSs is a widely discussed issue and many researchers have examined important aspects like measurement the linkage of strategy with the measures, balancing internal with external measures, mapping measures to processes, etc. (Kaplan and Norton, 1995; Bourne et al., 2000; Neely et al., 2002). The need to extend the knowledge around PMSs from the boundaries 1299 of a single firm to the level of supply chain has been suggested early in the pertinent literature (Van Hoek, 1998; Beamon, 1999). Supply chain management is a multidisciplinary field and it is addressed from many different perspectives. Otto and Kotzab (2003) through desk research identified system dynamics, operation research, logistics, marketing, organizational theory and strategy as relevant scientific fields to performance measurement in supply chains. These findings are in line with the suggestions of Neely et al. (1995) who proposed that a PMS should incorporate different perspectives, because they are of equal importance from a management perspective. The existence of different perspectives blurs the decision regarding what it is (or not) significant to measure in a supply chain, thus a growing, yet important, number of performance measures has been suggested in the literature. At the end of the 1990s, most of the measures suggested in the area of supply chain management were focusing on the performance of the logistics and distribution networks. Undoubtedly, measures related to the inventory cost or lead time are important, but provide limited and inadequate view when the level of discussion refers to complex supply chain settings. According to Van Hoek (1998), the scope of performance measurement in a supply chain needs to be holistic. A similar suggestion is also provided by other scholars, who agree that an integrated approach needs to be adopted when measuring performance in a supply chain (Bititci et al., 2000; Lambert and Pohlen, 2001). Beamon (1999) claimed that appropriate measures in supply chain management fall into three categories, namely resources, output and flexibility. Gunasekaran et al. (2001) argue that performance measures should be identified into different levels according to the decision-making process, thus the suggested measures are strategic, tactical and operational. De Toni and Tonchia (2001) suggested that financial and non-financial measures should be considered. In a synthetic and important study, Gunasekaran and Kobu (2007) reviewed the pertinent literature and a number of cases. They identified 46 different performance measures, addressing the performance of a supply chain. They remarked that almost 50 percent of the suggested performance measures are related to internal business processes (internal view) of a supply chain and the remaining 50 percent refer to the customer (external view) of the supply chain. Making the choice between the internal and the external view of a supply chain is also associated to finding the right balance between operational efficiency and customer responsiveness (Fisher, 1997). Other research efforts adopt a specific performance measurement framework (e.g. balanced scorecard) and suggest other sets of measures. For example, Kleijnen and Smits (2003) used balanced scorecard and through simulation they examined how performance metrics react with environmental and managerial control factors. In the same direction, Brewer and Speh (2000) followed the framework of balanced scorecard to measure supply chain performance. Gunasekaran et al. (2004) proposed a framework for performance measurement in the supply chain, incorporating several
  • 5. IMDS performance measures, like variances against budget, human resource productivity, 110,9 quality of delivered goods, etc. Depending on the supply chain activities and processes, measures from all many different perspectives are found in their suggested framework, which was further empirically validated. Most of the studies related to measuring performance in supply chains discuss what to measure and provide valuable information and guidelines for the design of the PMS. 1300 Folan and Browne (2005) reviewed the available recommendations and frameworks in the area of performance measurement and identified more than 30 propositions regarding how to build a PMS. Within the growing literature of recommendations, guidelines, performance measurement frameworks and suggested measures, little attention has been paid on case studies that would enable the validation and extraction of knowledge regarding the implementation and use of a PMS in the real environment. Hudson et al. (2001) surveyed the use of PMSs in small and medium enterprises and found substantial implementation barriers. The problems faced during the implementation of the balanced scorecard in a single firm are also reported in Ahn’s (2001) work. Bourne et al. (2003) were among the first who explicitly argued that the research stream of performance measurement is at the stage of identifying difficulties and pitfalls to be avoided based on practitioner experience. The need to bridge the gap between theory and practice has motivated the study of implementation issues of PMSs and frameworks (Lohman et al., 2004; Wagner and Kaufmann, 2004; Fernandes et al., 2006; Searcy et al., 2008). These studies point out the usefulness of adopting a specific performance measurement framework, but they also highlight important issues during the implementation. For example, Lohman et al. (2004) suggest that data uniformity is crucial, since different teams in the supply chain are the users of the single PMS. The discussion of implementing a PMS shifts the focus from the strategic/managerial perspective of performance, to the operational use and usefulness of an information system. The advocate work of Holmberg (2000) identified that systems thinking has an important role when developing PMSs in supply chains. In the same direction, Beamon (1999) suggested that a “system” of performance measures is required for accurate measurement of the supply chain. The implementation of a PMS addresses questions like which are the relevant data, how do available data support the selected performance measures, who has access to the measures, how is a measure linked to a corrective action, etc. Simatupang and Shidharan (2003) propose that the members of the supply chain should jointly agree on a PMS. Moreover, they suggest a generic process to measure performance in supply chains with the following steps: (1) design the PMS; (2) facilitate measurement though the utilization of a common information sharing and resource-allocation system; (3) provide incentives to the members of the supply chain; and (4) intensify performance, which addresses system’s maintenance though comparing and modifying performance measures. The aforementioned steps are highly related with a systems thinking approach, because they take into account how performance measurement affects decisions and participation of the members of the supply chain and in addition address the issue
  • 6. of maintaining the system. The approach of Bourne et al. (2000) is also based on Collaborative systems thinking, as they identify three different evolving stages for a PMS, namely performance design, implementation and maintenance. Speakman et al. (1998) argue that collaboration is a dominant approach in supply measurement chain management aimed to gain benefits and share results among the trading partners. Indeed, several researchers have reported that collaboration, enabled by information sharing, can increase the performance of a supply chain (Cachon and Fisher, 2000; 1301 Lee et al., 2000; Croson and Donohue, 2003; Pramatari and Miliotis, 2008). However, the impact on supply chain performance also depends on the kind of information shared, the frequency of sharing and the relationship between the trading partners (Kehoe and Boughton, 2001), making questionable whether collaboration achieves the expected results. Existing collaboration practices in supply chains, facilitated by information sharing, have not yet examined the performance systematically, implying the absence of a collaborative PMS. Most of the studies examining the impact of information sharing on supply chain performance utilize simulation models (Chen et al., 2007), numerical and experimental data analysis (Fu and Piplani, 2004), and surveys (Akintoye et al., 2000). In conclusion, the development and maintenance of a collaborative PMS has not been discussed in the pertinent literature. Moreover, the research community has long stressed the importance of case studies as a consolidation tool between existing theory and practice (Lohman et al., 2004; Hudson et al., 2001). To this end, we argue that the challenges to build a common PMS includes managerial and technological barriers that supply chain trading partners need to overcome. Based on these, the contribution of this work is summarized as follows: . It studies performance measurement in the supply chain based on a real case setting. . It focuses on the implementation issues and challenges of the PMS. . It refers to a collaborative supply chain with daily information sharing activities in the downstream of the supply chain. 3. Methodology 3.1 Research method Our empirical research has been facilitated through case study research. We have, specifically, selected an existing collaboration network comprising major product suppliers and a retail chain. The selection of this setting was done in order to meet the requirements of collaboration, namely trust and commitment between the trading partners (Speakman et al., 1998; Saura et al., 2009). The collaborating members have jointly developed a new store ordering and replenishment business process in order to align their strategic plans and provide increased service level to the end consumers, thus the information sharing is mainly conducted in the downstream of the supply chain. Moreover, the daily information sharing between the participants is facilitated by the internet and web technologies. After few years of operation, managers were not aware about the results achieved through this collaborative network. The main barrier has been the absence of a PMS measuring collaboration success (Law et al., 2009; Fawcett et al., 2008). Thus, on one hand, the management function had designed and jointly implemented a collaborative business process and, on the other, it was not able to fully evaluate the impact
  • 7. IMDS of the process. The decision to develop a common PMS has been facilitated by the 110,9 suggestions of Simatupang and Shidharan (2003) regarding the jointly agreement on what to measure and how to measure. Approaching a common agreement between multiple trading partners, regarding what to measure, few iterations are required (Figure 1). The scope of the collaboration and the respective PMS has been defined around the 1302 store replenishment process and the business needs associated with it. This further guided the review of the literature and identification of other relevant studies (Van Hoek, 1998; Beamon and Ware, 1998; Lambert and Cooper, 2000). Special attention has been paid to other collaborative planning, forecasting and replenishment cases within the retail industry, because the selected case has been based on this framework (Holmstrom et al., 2002; Seifert, 2002; Fliedner, 2003). The result was a set of candidate performance measures that were found relevant to implement by all the trading partners. The presentation of the candidate measures to the experts paved the ground for in-depth interviews and acted as the base to exchange ideas for refinement of the measures. At a later step, the performance measures were examined under two perspectives: (1) whether a common measurement method is acceptable by the trading partners; and (2) whether the available data of the collaborative network can support the performance measures. The final step dealt with the implementation and evaluation of the performance measures. Intentionally, all types of performance measures (e.g. financial and non-financial) were included. In the following sections, we present in more depth the two of the selected performance measures, inventory level and product availability, in order to demonstrate the challenges encountered during the development and evaluation of the PMS. Scope of the collaborative processes Relevant literature Candidate performance measures Review by experts Examine feasibility Agree for a common Available data supports No measurement method performance measures No Yes The measure could be supported Yes Implement the performance measures Figure 1. The research method followed Evaluate performance measures
  • 8. 3.2 Data availability Collaborative Through the collaborative platform supporting the store-replenishment process, we performance had access to various sources of data. Below an indicative list of the available data is presented: measurement . Point-of-sales data are the collection describing the sales of the store on a daily basis. . Orders data describe the requests placed from the store to the Central Warehouse 1303 (CWH) of the retail chain, depicting the products the store wants to replenish. . Deliveries data are the response of the CWH to the store, showing which products and how many items are delivered compared to what has been ordered. . Promotion plan is a calendar of the in-store promotion activities planned by the retailer and the supplier in collaboration for every store. . Product assortment is the list of the active products currently available at a specific store. Additionally, this file has information regarding the delivery method of a product (delivered by the CWH or direct store delivery (DSD) by the product supplier). . Physical store audits are based on physical visits of researchers to the store in order to spontaneously monitor Product Availability of selected products on the store shelves. 4. Empirical work 4.1 The case setting The collaborative supply chain of the case comprises three major product suppliers (two multinational and one national) currently offering more than 1,000 different products in the market. The retail chain has four CWHs and approximately 200 geographically disperse retail stores located in Greece. The collaboration was initiated by the product suppliers, who wanted to increase the visibility in the supply chain and acquire the benefits of information sharing. The long-time trading activities between the members of the supply chain ensured the sharing of common goals and beliefs for the Greek market, a high level of trust in the relationship and finally that the requirements of collaboration are met. Although two of the product suppliers are main competitors within important product categories (e.g. detergents and hair care) their collaboration with the same retailer did not present any competitive threat (Figure 2). The decisions made in collaboration are: . What items does a store need to replenish and in what quantities? . What are the expected sales (forecasts) per product? . Should the products be replenished by the retailer’s CWH or directly by the supplier? . Which is the recommenced product mix for each store? . Which products to promote and in which stores? The ordering decisions require the daily information sharing of various sources such as: POS data, store assortment, promotion activities, etc. The role of information technology is essential in the collaboration since large amounts of data need
  • 9. IMDS Collaboration platform 110,9 Direct store delivery 1304 Retailer distribution center (DC) Figure 2. The structure of the Product Backroom Shelf collaborative network suppliers Store to be processes timely and accurately and delivered in a usable manner both to suppliers and to the store managers. A startup company, following the software-as-a-service business model, developed and operated the collaboration platform. One of the service extensions was the development of a PMS, as performance measurement is a necessary tool for successful management (Phusavat et al., 2009). Managers from all the trading partners expressed their interest in examining the performance according to the objective of the collaboration, which has been “to offer high service level to consumers by efficiently handling the store ordering process enhanced by information sharing capabilities”. The design of the PMS should be linked to the collaboration strategy, in order to: . demonstrate the results achieved through the new store ordering and replenishment process and . stimulate learning on the product suppliers’ side wishing to evaluate the effect of collaboration and examine the possibility of expanding the collaboration process to other retail chains. Moreover, the adoption of a specific performance measurement framework (e.g. balanced scorecard) was found to be complex and costly, at least at the initial stage, due to the narrow and structured scope of the collaboration. Therefore, it was decided to study a limited number of performance measures focusing on the specific collaboration process and on the responsiveness to the consumer. Relevant works in PMS design have provided guidelines for the PMS of our case. Table I depicts how existing suggestions in the literature have affected some design options of the specific PMS. Based on discussions with the managers, we examined their motives to join this collaboration effort and reconfigure the store ordering and replenishment process. In particular, the trading partners had the following issues: . Inventory levels at the stores were not optimized, implying either overstocking or out-of-stock situations, and the participants expected that they would be able to handle the problem through collaboration.
  • 10. Collaborative Suggested in the literature Impact on the design of the PMS performance Reflect strategic alignment (Eccles, 1991; Understand the strategy of the collaboration as the measurement Kaplan and Norton, 1995; Bititci et al., 2000) tradeoff between effectiveness and responsiveness Focus on the results of collaboration Exclude financial performance measures at the initial stage 1305 Monitor critical activities (Azzone et al., 1991; Focus on the store-replenishment process Neely et al., 1995) Link of problematic areas with specific performance measures Focus at the store level of the supply chain Measure product delivery from supplier to The integrative view of the supply chain makes the customer (Dixon et al., 1990) consumer as the only customer Focus at the store level of the supply chain Provide measures that all members could Use collaboration platform to share performance Table I. understand (Dixon et al., 1990) measures in a daily base Utilizing literature Focus on measures that customer can see Develop performance measure that reflects the service suggestions in the PMS (Kaplan and Norton, 1995) level of the collaboration to the consumer design of the case . High forecast inaccuracies mean that demand forecasting could not be used for most of the products. . Product shelf unavailability (also referred to as out-of-shelf (OOS)) has recently emerged as one of the most important problems in the retail sector affecting revenue streams as well as consumer satisfaction. . Imperfect orders address a “weak” connection between the retailer’s central distribution center (DC) and he stores, implying that the DC is not able to cover the stores’ demand. Creating performance measures relevant to the problematic areas leverages the commitment of managers to participate in the design of the PMS. Table II links Problematic area Interested partner Candidate performance measures Inventory levels Supplier-retailer Inventory (Beamon, 1999) Fill rate (Kleijnen and Smits, 2003) Backorder/stockout (Beamon, 1999) Stockout probability (Beamon, 1999) Forecast accuracy Supplier Forecast accuracy (Gunasekaran et al., 2004; Fisher, 1997; Hadaya and Cassivi, 2007) Product shelf availability Supplier-retailer Flexibility of service system to meet customer needs (Gunasekaran et al., 2004) Point of consumption product availability (Neely et al., 1995) Imperfect orders Retailer Delivery reliability performance (Gunasekaran et al., 2004) Response delay (Kleijnen and Smits, 2003) Table II. Reliability (Neely et al., 1995) Problems identified and Deliverability (Neely et al., 1995) the associated On-time deliveries (Neely et al., 1995) performance measures
  • 11. IMDS the identified problematic areas with a set of candidate performance measures, as found 110,9 in the pertinent literature, and the partner mostly interested in the issue. From a system architecture perspective, the proposed PMS is located at the top of the collaboration platform in order to have access to all the available information and be visible to the respective trading partners. The PMS was developed as a reporting tool based on an integrative view of the shared data sources. Depending on the 1306 employed measurement method, we distinguish the performance measures into two categories: (1) Single performance measures are derived directly by the data sources, are deterministic in nature and can be expressed though simple formulas. (2) Composite performance measures extend the available data sources with other parameters (e.g. probabilities, loss functions, etc.). Studies in performance system design do not usually include the calculation method for each suggested performance measure. From a system perspective, this is a major drawback, because the linkage between the performance measure and the available data is missing. In our case, defining each performance measure was necessary in order to proceed with the implementation of the PMS. All measures are defined at the store and product level. Table III provides information for the implementation of the selected performance measures. In order to demonstrate the challenges associated with the development of a common PMS, the measures selected for in-depth investigation are inventory level and product availability. The reasons for selecting these two measures are: . they are the most critical measures in respect to the store replenishment process; . they measure problematic areas identified by both the retailer and supplier (Table II); . they increase supply chain visibility for the product supplier, because they offer a view at store level on a daily basis; and . the former is examined as a single performance measure and the later as a composite one. Performance measure Type Data used Description Frequency Inventory level Single Sales Number of items existing in the store Daily Deliveries for a certain product Forecast Composite Forecast plans The difference between the expected Weekly accuracy Sales sales and the observed sales. In-store promotion Seasonal and promotion activities amplification of the sales are taken into account Product Composite Sales Describes if a product is available on Daily availability Inventory levels the shelf of a store or not Table III. Product assortment A view of the Promotion activities performance Imperfect Single Orders Examines if the items and quantity Daily measures used orders Deliveries delivered meet the order of the store
  • 12. The next sections describe the challenges encountered during the development and Collaborative evaluation of the two performance measures. performance 4.2 Measuring inventory at the store measurement The inventory level of a product in a store is related with the product availability. On one hand, if a retail store has enough product quantity stored in the backroom to face the future consumer demand, at least within the lead time of the store replenishment cycle, 1307 then the possibility of stock out is minimized. On the other hand, ordering and stocking large amounts of a specific product would lead to overstocking situations. It would be unrealistic to count the inventory level at the end of each day for all the products in a store. The approach to use available information and subtract a product’s sales from the delivered quantities in order to determine the inventory level has high inaccuracy. According to Kang and Gershwin (2005), it is very difficult to maintain perfect inventory records at the store level due to various sources of error (e.g. shoplifting, damage of the products during the transportation, delays in information sharing, etc.). In the specific case, we found that inventory inaccurate records negatively affect the reliability of inventory level as a store performance measure. More specifically, in order to evaluate the accuracy of the inventory level measure, we selected nine representative stores and thoroughly examined the consistency between sales and deliveries for all the products for a six-month period. Depending on the delivery method, we classified the available products into three categories: (1) The CWH category includes the products that are delivered to the store through the retail CWH, i.e. retail DC, on a regular basis. (2) The second category is labeled DSD and includes the products delivered to the store directly by the supplier. (3) The last category (CWH/DSD) includes the products which do not meet any of the above classes. These products are replenished by both the CWH and the product supplier, in a mixture that is not known in advance, and it is subject to factors like demand fluctuations, stockout at the CWH, imperfect orders, etc. Table IV illustrates the distribution among the three classes. On one hand, Store 1 is the largest store examined, having over 5,000 different products in its assortment, while on the other hand the smallest store (Store 9) merchandises approximately 1,500 different products. Most of the products (approximately 48 percent) are delivered Delivery method Store CWH DSD CWH/DSD Number of products Store 1 2,291 (45.66%) 2,006 (39.98%) 721 (14.37%) 5,018 Store 2 1,459 (42.44%) 1,491 (43.37%) 488 (14.19%) 3,438 Store 3 2,169 (49.46%) 1,728 (39.41%) 488 (11.13%) 4,385 Store 4 2,533 (50.15%) 1,838 (36.39%) 680 (13.46%) 5,051 Store 5 1,813 (44.18%) 1,783 (43.45%) 508 (12.38%) 4,104 Store 6 1,065 (41.50%) 1,177 (45.87%) 324 (12.63%) 2,566 Table IV. Store 7 1,771 (43.14%) 1,770 (43.12%) 564 (13.74%) 4,105 Classification of products Store 8 1,780 (44.82%) 1,721 (43.34%) 470 (11.84%) 3,971 based on the sales and Store 9 735 (47.88%) 599 (39.02%) 201 (13.09%) 1,535 inventory records
  • 13. IMDS through the CWH, because the ordering cost is lower compared to the cost of the DSD. 110,9 The number of products delivered directly to the store varies between 35 and 45 percent, depending on the store size. The remaining products (that are neither CWH nor DSD) are classified under the CWH/DSD label. On average, this class represents 14 percent of products. The collaboration platform shares on a daily basis data from the retail chain, 1308 including deliveries and sales data. This means that the transactions referring to the CWH products are timely available through the platform and, thus, in the following, we look only at CWH products. We assume that the total delivered quantity (Q) should always exceed the observed sales (S) for a given product and store. Consequently, we adopt the holding inventory formula to calculate the inventory level as a store performance measure. By definition, holding inventory is non-negative and expressed by the following formula: Holding Inventory ¼ Q 2 S $ 0 ð1Þ The percentage of records that equation (1) is violated has been examined using the available data (POS and deliveries data). As Table V presents, around 9 percent of the records has a negative value for the holding inventory. This “unexpected” phenomenon is caused by deliveries occurring in the store and not monitored on time or at all by the information system. On the other extreme, the overstocked products are around 5 percent, according to the available records, which is significantly high for retail business. The inventory measure, relying on the available information, provides unrealistic results (negative values and high percent of overstocking items), which does not reflect the exact situation of the daily store inventory. However, we noticed that the holding inventory value for few product categories with long life cycle, low-priced products and small promotion activity (e.g. snacks and pasta) could be correctly estimated. Other categories, more expensive, with high promotion activity and frequent product introductions (e.g. detergents and shampoo) are on the other extreme, and it is very unlike to have a reliable performance measure. Real life events distort the available information regarding the inventory levels. Having only 50 percent of the available records in the area of the normal levels of holding inventory is an important barrier for the development of a widely acceptable performance measure in the specific case. Additionally, the variability of the holding Negative holding Very low-holding Low-holding Normal levels of inventory inventory inventory holding inventory Overstocking (%) (%) (%) (%) (%) Store 1 10.78 9.38 16.37 58.57 4.90 Store 2 10.56 14.05 28.10 43.98 3.31 Store 3 7.70 13.32 25.68 48.07 5.23 Store 4 13.42 11.69 18.56 48.91 7.42 Store 5 7.7 10.98 26.14 50.07 5.64 Store 6 9.11 15.21 34.18 36.76 4.74 Table V. Store 7 6.32 12.59 30.89 44.77 5.43 Inaccurate records of the Store 8 8.15 12.75 27.81 45.63 5.67 holding inventory Store 9 14.55 16.60 32.65 33.76 2.44
  • 14. inventory changes between the stores. To this end, the development of a performance Collaborative measure related to inventory level at the store could not be supported due to information performance quality restrictions. Possible options to gather a more realistic inventory view could be based on the following: measurement . employment of multiple inventory measurement methods for different stores and product categories; . use of probabilistic models to calculate inventory shrinkages; and 1309 . use of radio-frequency identification (RFID) technology. 4.3 Measuring product availability at the store The term product availability implies that a product is accessible by the consumer on the shelf of a retail outlet. However, empirical research has shown that it is not unusual that the product is not on the shelf when a consumer is looking for it, leading to lost sales and decreasing consumer loyalty. According to Gruen et al. (2002), the OOS rate is close to 8.3 percent worldwide, which is considered very high given that an acceptable level (determined by suppliers and retailers) would be less than 2 percent. Additionally, OOS rates of promoted items are much higher, affecting the promotional effectiveness (Gruen et al., 2002). In our case, the suppliers and the retail chain have found such a performance measure directly related to the objective of collaboration, since it depicts the responsiveness of the collaborative supply chain towards the end customer. Currently, the measurement of OOS is utilized through physical store audits, conducted by the retailer or the product suppliers. However, the high cost of measuring product availability and the dynamically changing states of the shelves are the major barriers for acquiring timely information and understanding the problem in detail. Company Alpha, as the owner of the collaboration platform had decided to implement a method for the evaluation of product availability at the store utilizing the available data. After thorough examination of the available computational methods, a sophisticated heuristic rule-based method was proposed in order to automatically detect products missing from the shelf. The method has been based on knowledge engineering principles and more than 100 different rules developed through a data-mining process (Papakiriakopoulos et al., 2009). Using the same rules on a daily basis and for all the stores of the retail chain, it is possible to detect products missing from the shelf. A sample of rules used for the automatic detection of OOS products is depicted in Table VI. Products merchandized RuleID Rule body Accuracy (%) Rule 21 (LastPosDays $ 3) AND (day ¼ ‘Wednesday’) AND (StoreSize ¼ ‘Large’) AND (SD_DailyPosAvg # 2.82) AND (FastMovingIdx . 0.76) 0.82 0.4 Rule 43 (LastPosDays . 6) AND (SD_PosAvg . 7.9) AND (day ¼ ‘Tuesday’) 0.42 0.1 Table VI. Rule 47 (TypeOfProducts ¼ ‘ADV’) AND (posavg . 1.9) Indicative rules used for AND (Last_Order . 12) AND detecting products (Mean_Order_quantity , 6) 0.91 0.01 missing from the shelf
  • 15. IMDS Although the rules have been found to accurately detect OOS products, they have an important drawback, because they cannot cover all the different cases of products 110,9 missing from the shelf. For example, Rule 21 characterizes as OOS the products that have not sold for the last three days (LastPosDays . ¼ 3), the day of detection is Wednesday (day ¼ “Wednesday”), the area of interest is only the large stores of the retail chain (Store_Size ¼ “Large”), the standard deviation of sales only for Wednesday 1310 should be low (SD_DailyPosAvg , ¼ 2.82) and finally the products are fast-moving items (FastMovingIdx . 0.76). This rule has relatively high detection accuracy (82 percent) but refers only to a small proportion of the total OOS occurring daily in the store. Thus, on one hand, the collaborative network acquired an accurate mechanism for measuring product availability; on the other hand, the mechanism only partially monitors the products merchandized by the store. However, a linear correlation has been found between the OOS rate and the number of products the system detects as OOS per day. The higher OOS rate a store has, the more OOS alarms it gets. Table VII presents the number of products that are active in a store, the average OOS rate, as estimated by physical store audits, and the average number of products the detection mechanism reports as OOS per day. As expected, stores with a greater OOS problem receive relatively higher counts by the detection mechanism. The performance measure for estimating product availability was found very interesting by the participants, but the measurement method employed was rather complicated. Based on the available data of the collaboration platform, an intelligent information system was designed and developed but this had limited detection capabilities for the products missing from the shelf. Nevertheless, the employed mechanism correctly detected the retail stores encountering the biggest OOS problem, thus offering a reasonable and uniform method to product suppliers and the retailer to agree on the stores having the lower product availability and to start planning corrective actions. 4.4 Implications and discussion The available case setting revealed some aspects in the area of performance measurement. The need for a universal framework for selecting performance measures in supply chains, as identified in the presented case, validates Beamon and Ware’s (1998) prior research. The challenges identified through the effort to build a common PMS could be grouped into three broad categories namely: (1) data management; (2) business-process management; and (3) collaboration. Real world Detection mechanism Products monitored Average OOS rate (%) Average daily alarmed products Store 1 4.548 8.91 78 Store 2 3.401 11.70 94 Table VII. Store 3 3.120 12.12 115 Relationship between Store 4 4.079 8.53 82 OOS and alarms by the Store 5 4.634 9.60 103 detection mechanism Store 6 2.870 12.47 117
  • 16. Data management. Data management includes all the actions performed during the life Collaborative cycle of shared data. While the importance of information sharing has been recognized in performance the literature (Yu et al., 2001), in practice information quality is a major obstacle. Information quality has been studied in the context of planning supply chain activities measurement and some researchers have expressed the opinion that information quality is positively related with the performance of the supply chain (Petersen et al., 2005; Simchi-Levi et al., 2008). Previous studies in the upstream supply chain have stressed the benefits of timely 1311 (Bourland et al., 1996; Karaesmen et al., 2004) and complete (Chu and Lee, 2006) information sharing. In our case, we examined a single performance measure (inventory level at the store), at the downstream supply chain. The data sources (sales and deliveries) were considered as timely and complete. Sales data were collected though the POS scanning infrastructure of the retail stores and the deliveries data were provided by the warehouse management system that controls the operations of the retail DC. However, their mix failed to accurately estimate the inventory levels at the store, due to shrinkage and other factors. The role of new technologies, and in particular RFID technology, could be a key enabler to improve information quality in an automated manner (Kelepouris et al., 2007; Lee and Park, 2008). The provision of inaccurate performance measures is associated with incorrect decisions. Managers utilize performance measures to quickly identify areas of improvement (Neely et al., 1995), therefore the provision of unreliable performance information, would eventually initiate unnecessary corrective actions and as a consequence the managers lose trust in the PMS. The role of trust is tightly linked with performance in inter-organizational settings (Zaheer et al., 1998), thus the quality of information provided by the PMS could hinder the performance if neither reliability checks nor quality control processes are considered during the implementation. Business-process management. The examined performance measures did not only reflect the quality of the shared data, but also support decisions on business processes that are not part of collaboration. For example, the shelf layout is subject to the category management business process, which is not covered by the collaboration platform presented in our case. Hence, the performance measure of product availability significantly depends on decisions made during the category management process. The complex nature of supply chain operations is an important challenge to overcome when implementing such PMSs (Fawcett et al., 2008). Following a “divide and conquer” approach, as suggested by systems thinking, to implement the PMS is contradictory with the integrative philosophy of managing a supply chain. Nevertheless, it was found to be a good managerial learning process, because it motivated managers to re-evaluate the scope of collaboration and identify existing business processes that need to be supported by the collaboration platform. To this end, the development of the measurement system itself can enhance the collaborative strategic management process by challenging the assumptions and the existing strategy (Bourne et al., 2000), providing growth prospects though continuous improvement programs. Prior works have stressed the importance of performance measurement to motivate people and stimulate learning in the organizations (Kaplan and Norton, 1995). In the presented case, the lessons acquired through performance measurement made collaborating partners re-evaluate the collaboration objectives, shift the focus from the timely information sharing to information quality and re-examine the scope of collaboration through the incorporation of new business processes.
  • 17. IMDS Collaboration. Most of the benefits identified on the product supplier side derived 110,9 from the practice of information sharing. Based on collaboration and information sharing, the trading partners reported better performance of decisions in the store- replenishment process (Lee and Whang, 1999). The availability of daily OOS alarms to suppliers per retail store has been considered as valuable information since it facilitates supply chain visibility and allows for rapid corrective actions. From the retailer’s 1312 perspective, this information is useful only because it provides a uniform approach to estimate the true OOS rate, thus is utilized as a benchmarking process for the stores. We believe that this is the main opportunity when developing common PMSs: while every partner activates its individual mechanisms and identifies areas of improvement in a different way, all of them share the common objective of collaboration. Collaboration in the supply chain is a key enabling factor for the implementation of a PMS. Bourne (2005) examined 16 different performance measurement cases at different levels of design and implementation. His findings suggest that the top management support is a key factor to proceed with the implementation phase, although in his study, only two cases finally managed to implement performance measures. The initial definition of collaboration (Speakman et al., 1998) implies the commitment of the trading partners, thus it is expected that a PMS referring to a collaboration effort is more likely to be implemented, as happened to our case. It is also important that non-financial performance measures are more likely to be part of the collaborative PMS for the next two reasons: (1) Financial measures are difficult to be agreed and designed because the resources are common and the cost centers are different for the trading partners. (2) Most of the managers want to identify the alignment between the jointly agreed objectives of collaboration and the results achieved. Common implementation problems, as already discussed in the literature, have been found in the presented case. Lack of a structured development process of the PMS (Hudson et al., 2001) and increased effort to collect data and support composite performance measures (Ahn, 2001) have been barriers to the implementation effort. However, resistance to measurement efforts (Bourne et al., 2000) and top management commitment (Neely et al., 1995) have not been substantial problems to the implementation of the presented PMS. At the early 1980s, a PMS was close to the budgetary control and aligned with accounting procedures (Traditional PMS). Ten years later, the management thinking approach broadened the view of performance measurement and initiated the discussion regarding strategic alignment of measuring performance, improvement though measurement, focus on the quality, etc. The role of supply chain management enabled by information technology allowed the discussion about an integrative approach on more complex structures and how to manage them though performance measurement (supply chain PMS). We could say that the case presented in this paper discusses what we could call a collaborative PMS, making performance measurement a central issue in managing collaboration (collaborative PMS). Table VIII summarizes the difference among the three classes of PMS. 5. Conclusions This paper discusses the development of a PMS in a collaborative context. Although companies in supply chain networks have the constant need to measure performance,
  • 18. Collaborative Traditional PMS Supply chain PMS Collaborative PMS performance Measuring Identify performance Identify performance Measures derived from the measurement measures dimensions according to the objective of collaboration supply chain structure Number of Variable number of Increased number of Limited number of measures performance measures performance measures to performance measures 1313 cover all the dimensions Measures Bias towards financial Focus on financial and non- Focus on non-financial usage measures financial measures measures Motives to Measure to improve Measure to understand, Measure to understand the measure identify areas and improve success of collaboration Approach Accounting Management thinking Systems thinking System thinking Data Significant effort to Very significant effort to Information sharing enabled management identify and gather data identify and gather data by technology Data issues Gather available data Integrate available data Information quality Table VIII. Scope Firm Firm and trading partners Collaborating partners Classification of PMSs the corresponding systems are in practice isolated. The existing knowledge in the area of performance measurement needs to be extended to cover the needs of a supply chain, where collaboration and information sharing practices integrate the participating companies into a single and integrative unit. The challenges we found during the development of a common PMS derive from data management, business process management and collaboration issues. The field is open in the identification of further challenges, opportunities and barriers. The proper use of IT is essential in the development of a common PMS, but we argue that the most important issues are context specific and related to the practical implementation. There are several limitations in this study; many are associated with the data used from the collaboration platform and others with the selected case setting. The first problem relates to the gap between the available data and the business processes supported by the collaboration network. Although the store-replenishment process is common for all the trading partners, the data used to support the selected performance measures have been found to be restrictive against the requirements of a common PMS, due to the complex nature of the setting (e.g. many participants, different information sources, etc.). Here, we can argue that the measures examined were in the area of a feasible solution for the specific case. Nevertheless, the challenges we have faced can be relevant to similar cases as well, where companies collaborate and share information to accomplish a specific business objective and not to build a common PMS, which is usually underestimated as a management function. The second problem deals with the limitations posed by examining only two performance measures. The examination of other performance measures might have led to slightly different results. As with any case study, the findings cannot easily be generalized to other empirical settings of relevant industrial sectors (e.g. pharmaceutics, cosmetics, etc.). Since these industries are sharing the same supply chain management principles, though, it is likely that they face similar challenges when developing a PMS. However, further investigation is required and a cross-industry comparative research might reveal a set of common challenges.
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  • 23. IMDS Further reading 110,9 Slack, N. (1991), The Manufacturing Advantage, Mercury Books, London. About the authors Dimitris Papakiriakopoulos holds a BSc in Informatics and MSc in Information Systems from Athens University of Economics and Business (AUEB), and a PhD in Information Systems and 1318 Artificial Intelligence also from AUEB. He is a Senior Research Officer at the ELTRUN Research Centre at AUEB. He has extensive research experience, having been involved in various research European projects for the last ten years and has more than 15 publications in scientific journals and international conferences. His research interests are on the area of machine learning methods, supply chain management and performance improvement though the intervention of technology. Dimitris Papakiriakopoulos is the corresponding author and can be contacted at: dpap@aueb.gr Katerina Pramatari is an Assistant Professor at the Department of Management Science and Technology of the AUEB. She holds a BSc in Informatics and MSc in Information Systems from AUEB, and a PhD in Information Systems and Supply Chain Management also from AUEB. She has won both business and academic distinctions and has been granted eight state and school scholarships. Her research and teaching areas are supply and demand chain collaboration, traceability and RFID, e-procurement, e-business integration and electronic services. She has published more than 60 papers in edited books, international conferences and scientific journals, including Decision Support Systems, Journal of Information Systems, Journal of Information Technology, The European Journal of OR, Computers and OR, Supply Chain Management: An International Journal, and International Journal of Information Management. To purchase reprints of this article please e-mail: reprints@emeraldinsight.com Or visit our web site for further details: www.emeraldinsight.com/reprints