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1. Running head: INFORMATION SYSTEM INFRASTRUCTURE 1
Information System Infrastructure
An Assignment Submitted by
Name of Student
Name of Establishment

2. INFORMATION SYSTEM INFRASTRUCTURE 2
Abstract
This paper provides an analysis and recommendations on implementation of information
system for a car rental business. It is based on theoretical aspects of data management,
work of databases and business processes applied through the web interface. The main
objective of the paper is to provide two information systems possible for business
implementation, provide comparative analysis, suggest recommendations and give a set
of arguments on the most important aspects of information system structure in the scope
of functioning within the business environment.

3. INFORMATION SYSTEM INFRASTRUCTURE 3
TABLE OF CONTENTS
ABSTRACT…………………………………………………………………. 2
LIST OF FIGURES…………………………………………………………. 4
LIST OF TABLES…………………………………………………………… 5
CHAPTERS…………………………………………………………………. 6
I. INTRODUCTION………………………………………………… 6
II. ARCHITECTURE DIAGRAMS…………………………………. 7
III. COMPARISON OF ALTERNATIVES………………………….. 9
IV. DATA MODELLING DIAGRAM………………………………. 11
V. CONCLUSION…………………………………………………… 12
REFERENCES……………………………………………………………… 13

4. INFORMATION SYSTEM INFRASTRUCTURE 4
List of figures
Figure 1. First 3-tier client-server model for car rental management system. 7
Figure 2. Second 3-tier client-server model for car rental management
system………………………………………………………………………………….. 8
Figure 3. Data Modelling diagram for car rental information system………... 11

5. INFORMATION SYSTEM INFRASTRUCTURE 5
List of tables
Table 1. The comparison of two information systems for the car rental
business………………………………………………………………………………… 9

6. INFORMATION SYSTEM INFRASTRUCTURE 6
Information System Infrastructure
Current trends in usage of information systems for either small or big businesses
demonstrate that it is important part of equation, where knowledge multiplied by
technology brings incremental profit. The idea is of a competitive advantage across the
business environment. Hoffer, Ramesh and Topi indicate that “advantage goes to people
and organizations that collect, manage and interpret information effectively” (p. 3). It is
particularly important while dealing with the big amount of data required to be processed
without delays. In order to provide the broader view on the problem, we will analyze two
possible systems applicable for car rental business, assuming the potential expansion
through the markets and wide usage of online services.
Before conducting an analysis on potential development models for the business,
it is important to describe several critical factors influencing the business. First, the
business is at its forming stage and has not operated with complex information systems
before, using a home-built application for its needs. It means that the complete
outsourcing model would not fit here. Second, the business expanded from car
replacement structure to full rental structure since the operations spread to the airport and
centres of tourism. Therefore, the business is now concerned with architecture solutions
and internal communication between its parts (“Enterprise Architecture”, 2012). Third,
the essential part of the whole approach is to make the system easily accessible and to
drive excellent performance. This is also includes certain stages within the system
development aimed on marketing, which is possible through the social networking and
Web 2.0 tools. It means that the certain mechanisms within the system are intended to
operate via converting some abstract content into the actual presentation for dealing with

7. INFORMATION SYSTEM INFRASTRUCTURE 7
various ways of presenting the end data for users (“Web programming. Part I - XHTML”,
2012).
Architecture diagrams
The first solution for car rental system design is presented as a 3-tier client-server
model, focusing on the three parts titled as client, application server and database server
(“The Internet and Web Infrastructure”, 2012):
Figure 1. First 3-tier client-server model for car rental management system.
LEVEL 1: CLIENT
Client hardware
(computer, phone, other
input/output device
Third party hardware
(computer, phone, other
input/output device
LEVEL 2: APPLICATION SERVER
Requests processing
module
Payments processing
module
LEVEL 3: DATABASE SERVER

8. INFORMATION SYSTEM INFRASTRUCTURE 8
The above diagram provides a simple 3-tier processing system assigned as
centralized data storage. On the first level the customer can access either company
website or social network application, registering in a system and ordering a car. The
database administrator then receives a notification through the messaging system that
new order was received and processes it further. The output for the administrator is the
complete database with multiple keys needs being processed with a high accuracy. It does
not distribute each customer in a separate spreadsheet. However, the approach is more
flexible in terms of security since not requires encrypted connection.
The second diagram gives another perspective using the outsourcing software
module:
Figure 2. Second 3-tier client-server model for car rental management system
PC Station
1
PC Station
2
PC Station
3
Application server
(distributed
operations)
Database
order 1
Database
order 2
Database
order 3

9. INFORMATION SYSTEM INFRASTRUCTURE 9
In this model the outsourcing application installed on application server level,
allowing distribution of each order for a specified customer. As soon as the payment was
done, the account is archived. However, the problem is direct addressing and
interconnection between the application and user, which could present issues with
security protocols and wrong distribution of the orders.
Comparison of alternatives
Further research provides a comparative analysis of two information systems in a
table format, indicating advantages and disadvantages for selected models:
Table 1
The comparison of two information systems for the car rental business
Specification 1st model 2nd model Comments
Data processing Server and
terminal
processing,
Windows
operating
system
Distributed
processing,
Windows
operating
system
Second option is more user-
friendly, but has particular
risks on security level while
distributing data under
Windows applications.
Data
communication/networking
WAN,
Web-based
WAN,
Wireless,
Web-based
Advantage in wireless
networking, but still with
security risks and increased
costs.

10. INFORMATION SYSTEM INFRASTRUCTURE 10
Database management/data
storage
Centralized
storage
Distributed
storage
Outsourcing to the third party
brings additional costs which
is not effective for this system.
Security and Management https
protocol
https
protocol
Other options might be not
compatible with user systems
since it is required to operate
under multiple browsers and
Windows versions.
Flexibility and Scalability Distributed
computing
Both
Distributed
and Cloud
computing
Cloud computing might cause
additional security issues and
vulnerability testing.
CRM Functions Outsources
or locally
developed
applications
Outsources
or locally
developed
applications
The highest focus is on
applicability of social network
tools, but both systems are
capable of calculations.
Summarizing, the major restrictions for smooth operations are connected to
security specifications and preliminary defined access to the system worldwide, given
that the business is intended to be accessible across multiple geographies. The first model
is more security oriented, that is why user interface might not require long-term
authorization processes and late payments. The second one is more user friendly,

11. INFORMATION SYSTEM INFRASTRUCTURE 11
providing high speed of transactions but, to avoid security problems, might probably
bring long registration and authorization processes instead.
Data modelling diagram
The last part of this research provides the entity-relationships modelling diagram
applicable for both cases described above (“Database Systems”, 2012):
Figure 3. Data Modelling diagram for car rental information system
Reservation
Agreement ID
Payment ID
Rate ID
Car
Car ID
Rate ID
Mileage
Date_leaves
Time_leaves
Date_return
Time_return
Coll_damage
Pers_accident
Gas_amount
Rental
Agreement ID
Full name
Rate ID
Car ID
Date_leaves
Time_leaves
Mileage
Date_return
Time_return
Driver
Full name
Birth Date
License number
State of issue
Rate class
Rate ID
Customer
Full name
Birth Date
License number
State of issue
Deposit ID
Inspection
Coll_damage
Pers_accident
Extra charge
Coll_damage
Pers_accident
Gas_amount
Payment ID
Payment
Payment ID
Deposit ID
Agreement ID
has
M
M
1
1
has
1 1has
1
M
is
1 1
Consists of
1
M
has1 1
1
1
1
1
Consists of

12. INFORMATION SYSTEM INFRASTRUCTURE 12
Conclusion
This paper provided a short overview of the importance of information systems in
current business and focused on comparative analysis of two potential information
systems for the car rental business. Given the fact the business is expanding, the necessity
of system application is pretty high. The first model described under this research is more
focused on security, and the second brings the accessibility. The practical decision on
what system to select is mostly dependent on the costs. The second approach seems to be
more applicable for end users, but requires more investments for realization. Also, this
paper provided several examples for practical application of data modelling. Further
researches indicating additional data are possible as well.

13. INFORMATION SYSTEM INFRASTRUCTURE 13
References
Database Systems (2012). Poster session presented by Deakin University, School of
Information Systems.
Enterprise Architecture (2012). Poster session presented by Deakin University, School of
Information Systems.
Hoffer, J. A., Ramesh V. & Topi, H. (2010). Modern Database Management (Tenth ed.).
New Jersey: Prentice Hall.
The Internet and Web Infrastructure (2012). Poster session presented by Deakin
University, School of Information Systems.
Web programming. Part I – XHTML (2012). Poster session presented by Deakin
University, School of Information Systems.