SlideShare a Scribd company logo
1 of 14
Download to read offline
10/16/2010




                                     Human Resources, Job
    10                                 Design, and Work
                                        Measurement                                     Global Company Profile: Rusty
                                                                                                                              Outline

                                                                                        Wallace’s NASCAR Racing Team
                                                                                        Human Resource Strategy for
                                                                                        Competitive Advantage
   PowerPoint presentation to accompany
   Heizer and Render                                                                              Constraints on Human Resource Strategy
   Operations Management, 10e
   Principles of Operations Management, 8e                                              Labor Planning
   PowerPoint slides by Jeff Heyl                                                                 Employment-Stability Policies
                                                                                                  Work Schedules
                                                                                                  Job Classifications and Work Rules
© 2011 Pearson Education, Inc. publishing as Prentice Hall     10 - 1   © 2011 Pearson Education, Inc. publishing as Prentice Hall         10 - 2




                          Outline – Continued                                                     Outline – Continued
                 Job Design                                                                Methods Analysis
                            Labor Specialization                                           The Visual Workplace
                            Job Expansion                                                  Labor Standards
                            Psychological Components of Job
                                                                                                      Historical Experience
                                                                                                      Hi    i lE      i
                            Design
                                                                                                      Time Studies
                            Self-Directed Teams
                                                                                                      Predetermined Time Standards
                            Motivation and Incentive Systems
                                                                                                      Work Sampling
                 Ergonomics and the Work
                 Environment                                                               Ethics
© 2011 Pearson Education, Inc. publishing as Prentice Hall     10 - 3   © 2011 Pearson Education, Inc. publishing as Prentice Hall         10 - 4




                          Learning Objectives                                                     Learning Objectives
       When you complete this chapter you                                      When you complete this chapter you
       should be able to:                                                      should be able to:

            1. Describe labor planning policies                                     5. Identify four ways of establishing
                                                                                       labor standards
            2. Identify the major issues in job design
                                                                                    6. Compute the normal and standard
            3. Identify major ergonomic and work                                       times in a time study
               environment issues
                                                                                    7. Find the proper sample size for a time
            4. Use the tools of methods analysis                                       study


© 2011 Pearson Education, Inc. publishing as Prentice Hall     10 - 5   © 2011 Pearson Education, Inc. publishing as Prentice Hall         10 - 6




                                                                                                                                                    1
10/16/2010




                        Rusty Wallace’s NASCAR                                                 Rusty Wallace’s NASCAR
                              Racing Team                                                            Racing Team
                    NASCAR racing became very                                              Each position has very specific
                    popular in the 1990s with huge                                         work standards
                    sponsorship and prize money
                                                                                           Pit crews are highly organized
                    High performance pit crews are a                                       and go though rigorous physical
                    key element of a successful race                                       training
                    team
                                                                                           Pit stops are videotaped to look
                    Pit crew members can earn                                              for improvements
                    $100,000 per year – for changing
                    tires!
© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 7    © 2011 Pearson Education, Inc. publishing as Prentice Hall                                              10 - 8




                        Rusty Wallace’s NASCAR
                              Racing Team
                                                                                   Human Resource Strategy

                                                                                   The objective of a human resource
                                                                                    strategy is to manage labor and
                                                                                  design jobs so people are effectively
                                                                                         and efficiently utilized




© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 9    © 2011 Pearson Education, Inc. publishing as Prentice Hall                                              10 - 10




                                                                                            Constraints on Human
            Human Resource Strategy                                                          Resource Strategy
                                                                                Product strategy                                                         Process strategy
         1. People should be effectively utilized                               • Skills needed                                                          • Technology
                                                                                • Talents needed                                                         • Machinery and
            within the constraints of other                                     • Materials used                                                           equipment used
                                                                                • Safety
            operations management decisions                                                                                                              • Safety


         2.
         2 People should have a reasonable quality                              Schedules
                                                                                • Time of day
                                                                                                                                                      Individual differences
                                                                                                                 When                HUMAN        Who • Strength and
            of work life in an atmosphere of mutual                             • Time of year
                                                                                                                                    RESOURCE
                                                                                                                                                        fatigue
                                                                                  (seasonal)                                                          • Information
            commitment and trust                                                • Stability of                                      STRATEGY            processing and
                                                                                  schedules                                                             response

                                                                                Location strategy                                                         Layout strategy
                                                                                • Climate                                                                 • Fixed position
                                                                                • Temperature                                                             • Process
                                                                                • Noise                                                                   • Assembly line
                                                                                • Light                                                                   • Work cell
                                                                                • Air quality                                                             • Product
© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 11   © 2011 Pearson Education, Inc. publishing as Prentice Hall
                                                                                                                                          Figure 10.1                          10 - 12




                                                                                                                                                                                         2
10/16/2010




                                    Labor Planning                                                                     Labor Planning
       Employment Stability Policies                                                      Employment Stability Policies
        1. Follow demand exactly                                                           2. Hold employment constant
                           Matches direct labor costs to                                                      Maintains trained workforce
                           production                                                                         Minimizes hiring, termination, and
                           Incurs costs in hiring and                                                         unemployment costs
                           termination, unemployment                                                          Employees may be underutilized
                           insurance, and premium wages                                                       during slack periods
                           Labor is treated as a variable cost                                                Labor is treated as a fixed cost

© 2011 Pearson Education, Inc. publishing as Prentice Hall               10 - 13   © 2011 Pearson Education, Inc. publishing as Prentice Hall      10 - 14




                                  Work Schedules                                                         Job Classification and
                                                                                                              Work Rules
                         Standard work schedule
                                   Five eight-hour days                                               Specify who can do what
                         Flex-time                                                                    Specify when they can do it
                                   Allows employees, within limits, to                                Specify under what conditions
                                   determine their own schedules
                                                                                                      they can do it
                         Flexible work week
                                   Fewer but longer days
                                                                                                      Often result of union contracts
                         Part-time                                                                    Restricts flexibility in assignments
                                   Fewer, possibly irregular, hours
                                                                                                      and consequently efficiency of
                                                                                                      production
© 2011 Pearson Education, Inc. publishing as Prentice Hall               10 - 15   © 2011 Pearson Education, Inc. publishing as Prentice Hall      10 - 16




                                             Job Design                                                     Labor Specialization
                      Specifying the tasks that                                                       The division of labor into unique tasks
                      constitute a job for an individual
                                                                                                      First suggested by Adam Smith in 1776
                      or a group
                                                                                                         1. Development of dexterity
                         1.
                         1 Job specialization
                                                                                                         2. Less loss of time
                         2. Job expansion                                                                3. Development of specialized tools
                         3. Psychological components                                                  Later Charles Babbage (1832) added
                         4. Self-directed teams                                                       another consideration
                         5. Motivation and incentive systems                                             1. Wages exactly fit the required skill
                                                                                                            required

© 2011 Pearson Education, Inc. publishing as Prentice Hall               10 - 17   © 2011 Pearson Education, Inc. publishing as Prentice Hall      10 - 18




                                                                                                                                                             3
10/16/2010




                                     Job Expansion                                                     Job Enlargement
                                                                                                                                Enriched job
                 Adding more variety to jobs                                                                                    Planning
                                                                                                                         (Participate in a cross-
                                                                                                                             function quality
                 Intended to reduce boredom                                                                                improvement team)
                 associated with labor specialization
                                                                                                                                                            Enlarged job
                           Job enlargement                                      Task #3                                        Present job              Task #2
                                                                          (Lock printed circuit                            (Manually insert and     (Adhere labels
                           Job rotation                                   board into fixture for
                                                                            next operation)
                                                                                                                           solder six resistors)       to printed
                                                                                                                                                     circuit board)
                           Job enrichment
                           Employee empowerment                                                                                    Control
                                                                                                                             (Test circuits after
                                                                                                                                 assembly)
                                                                                                                                                            Figure 10.2
© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 19   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                               10 - 20




         Psychological Components                                                                  Hawthorne Studies
              of Job Design
                                                                                      They studied light levels, but discovered
             Human resource strategy requires                                         productivity improvement was
                                                                                      independent from lighting levels
             consideration of the psychological
             components                                                               Introduced psychology into the workplace
                                                                                                 p y     gy              p
             of job design                                                            The workplace social system and distinct
                                                                                      roles played by individuals may be more
                                                                                      important than physical factors
                                                                                      Individual differences may be dominant in
                                                                                      job expectation and contribution

© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 21   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                               10 - 22




               Core Job Characteristics                                                   Job Design Continuum
                                                                                                                                                       Self-directed
          Jobs should include the following                                                                                                            teams

          characteristics
                                                                                                                                         Empowerment
                                                                                                                                                                                  ection




                           1. Skill variety
                                                                                                                                                                          Self-dire




                                                                                                                              Enrichment
                           2. Job identity
                           3. Job significance                                                       Enlargement

                           4. Autonomy
                                                                              Specialization
                           5. Feedback                                                                                       Job expansion
                                                                                                                                                          Figure 10.3

© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 23   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                               10 - 24




                                                                                                                                                                                           4
10/16/2010




                          Self-
                          Self-Directed Teams                                                          Self-
                                                                                                       Self-Directed Teams
                   Group of empowered individuals                               To maximize effectiveness, managers should
                   working together to reach a
                   common goal                                                                      Ensure those who have legitimate
                                                                                                    contributions are on the team
                   May be organized for long-term or
                   short-term objectives                                                            Provide management support
                                                                                                    P   id           t       t
                                                                                                    Ensure the necessary training
                   Effective because
                                                                                                    Endorse clear objectives and goals
                             Provide employee empowerment
                                                                                                    Financial and non-financial rewards
                             Ensure core job characteristics
                             Meet individual psychological needs                                    Supervisors must release control

© 2011 Pearson Education, Inc. publishing as Prentice Hall         10 - 25   © 2011 Pearson Education, Inc. publishing as Prentice Hall      10 - 26




                   Benefits of Teams and                                                                   Limitations of Job
                   Expanded Job Designs                                                                        Expansion
                 Improved quality of work life
                                                                                           1. Higher capital cost
                 Improved job satisfaction
                                                                                           2. Individuals may p
                                                                                                            y prefer simple jobs
                                                                                                                        p j
                 Increased motivation
                 I       d    i i
                                                                                           3. Higher wages rates for greater skills
                 Allows employees to accept more                                           4. Smaller labor pool
                 responsibility
                                                                                           5. Higher training costs
                 Improved productivity and quality
                 Reduced turnover and absenteeism
© 2011 Pearson Education, Inc. publishing as Prentice Hall         10 - 27   © 2011 Pearson Education, Inc. publishing as Prentice Hall      10 - 28




                              Limitations of Job                                             Motivation and Incentive
                                  Expansion                                                           Systems
                                                                                              Bonuses - cash or stock options
              1. Higher capital cost                                                          Profit-sharing - profits for distribution to
              2. Individuals may p
                               y prefer simple jobs
                                           p j                                                employees
              3. Higher wages rates for greater skills                                        Gain sharing - rewards for
                                                                                              improvements
              4. Smaller labor pool
                                                                                              Incentive plans - typically based on
              5. Higher training costs                                                        production rates
                                                                                              Knowledge-based systems - reward for
                                                                                              knowledge or skills
© 2011 Pearson Education, Inc. publishing as Prentice Hall         10 - 29   © 2011 Pearson Education, Inc. publishing as Prentice Hall      10 - 30




                                                                                                                                                       5
10/16/2010




             Ergonomics and the Work                                                                      Ergonomics and Work
                   Environment                                                                                  Methods
                  Ergonomics is the study of the                                                          Feedback to operators
                  interface between man and                                                               The work
                  machine                                                                                 environment
                            Often called                                                                            Illumination
                            human factors                                                                           Noise
                  Operator input                                                                                    Temperature
                  to machines
                                                                                                                    Humidity

© 2011 Pearson Education, Inc. publishing as Prentice Hall                 10 - 31   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                    10 - 32




                Recommended Levels of                                                                       Levels of Illumination
                     Illumination                                                            Task Condition                       Type of Task    Illumination        Type of
                                                                                                                                    or Area           Level        Illumination
                                                                                            Small detail,                   Sewing, inspecting        100        Overhead
                                                                                             extreme                         dark materials                       ceiling lights
                                                                                             accuracy                                                             and desk lamp
                                                                                            Normal detail,                  Reading, parts           20-50       Overhead
                                                                                             prolonged                       assembly,                            ceiling lights
                                                                                             periods                         general office
                                                                                                                             work
                                                                                            Good contrast,                  Recreational             5-10        Overhead
                                                                                             fairly large                    facilities                           ceiling lights
                                                                                             objects
                                                                                            Large objects                   Restaurants,              2-5        Overhead
                                                                                                                             stairways,                           ceiling lights
                                                                                                                             warehouses
          Figure 10.4A

© 2011 Pearson Education, Inc. publishing as Prentice Hall                 10 - 33   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                    10 - 34




                                      Decibel Levels                                                                Methods Analysis
                                                                                                       Focuses on how task is performed
                                                                                                       Used to analyze
                                                                                                          1. Movement of individuals or material
                                                                                                                            Flow diagrams and process charts
                                                                                                          2. Activities of human and machine
                                                                                                             and crew activity
                                                                                                                            Activity charts
                                                                                                          3. Body movement
                                                                                                                            Operations charts
                                                             Table 10.4B
© 2011 Pearson Education, Inc. publishing as Prentice Hall                 10 - 35   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                    10 - 36




                                                                                                                                                                                             6
10/16/2010




                                        Flow Diagram                                                                                                     Flow Diagram

                                                                                  Welding
                                                                                                                                                                              Machine 4              Welding
                            From
                                                                                                                                                                    Machine 3
                                                     Storage bins
                           p
                           press
                           mach.                                                  Paint
                                                                                  P i t                                                                                                              Paint
                                                                                                                                                                                                     P i t
                                                                                  shop                                                                              Machine 2                        shop
                                                              Mach. 3   Mach. 4
                                                                                                                                                                               Machine 1
                                         Machine 1                                                                                                        From
                                                                                                                                                          press                            Storage
                                                                                                                                                          mach.                             bins

                                                             Mach. 2




                                                                                     Figure 10.5 (a)                                                                                                    Figure 10.5 (b)
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                             10 - 37   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                               10 - 38




                                                                                                                                                         Activity Chart
        Process
        Chart




          Figure 10.5 (c)
                                                                                                                                                                                                               Figure 10.6
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                             10 - 39   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                               10 - 40




                                   Operation Chart                                                                                     The Visual Workplace
                                                                                                                                     Use low-cost visual devices to
                                                                                                                                     share information quickly and
                                                                                                                                     accurately
                                                                                                                                     Displays and graphs replace
                                                                                                                                        p y       g p      p
                                                                                                                                     printouts and paperwork
                                                                                                                                     Able to provide timely information
                                                                                                                                     in a dynamic environment
                                                                                                                                     System should focus on
                                                                                                                                     improvement
                                                                                            Figure 10.7
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                             10 - 41   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                               10 - 42




                                                                                                                                                                                                                                    7
10/16/2010




                      The Visual Workplace                                                                                     The Visual Workplace
                                                                                                                        Visual utensil holder                         A “3-minute service”
        Visual signals can take many forms                                                                              encourages
                                                                                                                        housekeeping
                                                                                                                                                                      clock reminds employees
                                                                                                                                                                      of the goal
        and serve many functions

                                    Present the big picture
                                    Performance
                                    Housekeeping


                                                                                                                                                                                      Figure 10.8
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                     10 - 43   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                 10 - 44




                      The Visual Workplace                                                                                     The Visual Workplace
               Visual signals at the                         Visual kanbans reduce
               machine notify                                inventory and foster JIT
               support personnel

                                                                        Reorder
       Line/machine                                                     point
       stoppage

       Parts/
       maintenance
       needed
                                                                                                                  Quantities in bins indicate
                                                                                                                  ongoing daily requirements
       All systems go                                                                                             and clipboards provide
                                                                                                                  information on schedule                             Process specifications and
                                                              Part A    Part B        Part C                                                                          operating procedures are
                                                                                                                  changes
                            Andon                                                                                                                                     posted in each work area

                                                                                 Figure 10.8                                                                                          Figure 10.8
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                     10 - 45   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                 10 - 46




                                 Labor Standards                                                                                          Labor Standards
                   Effective manpower planning is                                                                           Started early in the 20th century
                   dependent on a knowledge of the                                                                          Important to both manufacturing
                   labor required                                                                                           and service organizations
                   Labor standards are the amount                                                                           Necessary f d t
                                                                                                                            N           for determining
                                                                                                                                                  i i
                   of time required to perform a job                                                                        staffing requirements
                   or part of a job
                                                                                                                            Important to labor incentive
                   Accurate labor standards help                                                                            systems
                   determine labor requirements,
                   costs, and fair work
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                     10 - 47   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                 10 - 48




                                                                                                                                                                                                              8
10/16/2010




           Meaningful Standards Help                                                                    Labor Standards
                  Determine
          1. Labor content of items produced                                  May be set in four ways:
          2. Staffing needs
                                                                                                         p
                                                                                         1. Historical experience
          3.
          3 Cost and time estimates
                                                                                         2. Time studies
          4. Crew size and work balance
                                                                                         3. Predetermined time standards
          5. Expected production
                                                                                         4. Work sampling
          6. Basis of wage incentive plans
          7. Efficiency of employees
© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 49   © 2011 Pearson Education, Inc. publishing as Prentice Hall                               10 - 50




                       Historical Experience                                                                    Time Studies
                     How the task was performed last
                     time                                                                  Involves timing a sample of a
                                                                                           worker’s performance and using
                     Easy and inexpensive                                                  it to set a standard
                     Data available from production                                        Requires trained and experienced
                     records or time cards                                                 observers
                     Data is not objective and may be                                      Cannot be set before the work is
                     inaccurate                                                            performed
                     Not recommended
© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 51   © 2011 Pearson Education, Inc. publishing as Prentice Hall                               10 - 52




                                         Time Studies                                                           Time Studies
                                                                                 5. Compute average observed time
         1. Define the task to be studied
                                                                                                                                    Sum of the times recorded
         2. Divide the task into precise                                                  Average                                    to perform each element
                                                                                          observed                    =
            elements                                                                        time                                     Number of observations

         3. Decide how many times to
            measure the task                                                     6. Determine performance rating
                                                                                    and normal time
         4. Time and record element times and
                                                                                                                          Average
            rating of performance                                                   Normal time =                         observed          x
                                                                                                                                                Performance
                                                                                                                                                rating factor
                                                                                                                            time

© 2011 Pearson Education, Inc. publishing as Prentice Hall   10 - 53   © 2011 Pearson Education, Inc. publishing as Prentice Hall                               10 - 54




                                                                                                                                                                          9
10/16/2010




                                         Time Studies                                                                              Rest Allowances
                                                                                                                  Personal time allowance
        7. Add the normal times for each
                                                                                                                             4% - 7% of total time for use of
           element to develop the total normal                                                                               restroom, water fountain, etc.
           time for the task
                                                                                                                  Delay allowance
        8. Compute the standard time
                                                                                                                             Based upon actual delays that occur
                                                              Total normal time                                   Fatigue allowance
                         Standard time =
                                                             1 - Allowance factor                                            Based on our knowledge of human
                                                                                                                             energy expenditure

© 2011 Pearson Education, Inc. publishing as Prentice Hall                              10 - 55   © 2011 Pearson Education, Inc. publishing as Prentice Hall        10 - 56




                                 Rest Allowances                                                                                   Rest Allowances
        1. Constant allowance                                                                                        (C) Use of force or muscular energy in
            (A) Personal allowance ……………...                                         5                                    lifting, pulling, pushing
            (B) Basic fatigue allowance …………                                        4                                    Weight lifted (pounds)
        2. Variable allowances:                                                                                          20 …………………………………… 3
            (A) Standing allowance ………………                                           2                                    40……………………………………. 9
                                                                                                                         40
            (B) Abnormal position                                                                                        60……………………………………. 17
                 (i) Awkward (bending) …………                                         2                                (D) Bad light:
                 (ii) Very awkward (lying,                                                                                  (i) Well below recommended…. 2
                      stretching) ……………………                                          7                                       (ii) Quite inadequate……………. 5
     Table 10.1                                                                                        Figure 10.1
© 2011 Pearson Education, Inc. publishing as Prentice Hall                              10 - 57   © 2011 Pearson Education, Inc. publishing as Prentice Hall        10 - 58




                                 Rest Allowances                                                                                   Rest Allowances
                   (E) Atmospheric conditions                                                                        (H) Mental strain:
                       (heat and humidity) …………… 0-10                                                                    (i) Complex or wide span
                   (F) Close attention:                                                                                       of attention.……………………..           4
                       (i) Fine or exacting……………….. 2                                                                    (ii) Very complex…………………..             8
                       (ii) Very fine or very exacting…… 5                                                           (I) Tediousness:
                   (G) Noise level:                                                                                      (i) Tedious…………..………………                2
                       (i) Intermittent—loud…………….. 2                                                                    (ii) Very tedious.……………………             5
                       (ii) Intermittent—very loud
                             or high-pitched………………... 5
     Figure 10.1                                                                                       Figure 10.1
© 2011 Pearson Education, Inc. publishing as Prentice Hall                              10 - 59   © 2011 Pearson Education, Inc. publishing as Prentice Hall        10 - 60




                                                                                                                                                                              10
10/16/2010




                     Time Study Example 1                                                                         Time Study Example 2
              Average observed time = 4.0 minutes                                                    Allowance factor = 15%
              Worker rating = 85%                                                                                                                     Cycle Observed (in minutes)
              Allowance factor = 13%                                                                                                                                                 Performance
                                                                                                              Job Element                                 1    2    3     4    5        Rating
                                                                                                (A) Compose and type letter                               8   10     9   21*   11        120%
    Normal time = (Average observed time) x (Rating factor)
                                                                                                (B) Type envelope address                                 2    3     2     1   3         105%
                = (4.0)(.85)                                                                    (C) Stuff, stamp, seal, and                               2    1    5*     2   1         110%
                                  = 3.4 minutes                                                      sort envelopes

                                                                                                   1. Delete unusual or nonrecurring observations (marked with *)
                                                 Normal time         3.4     3.4                   2. Compute average times for each element
   Standard time =                                               =         =
                                            1 - Allowance factor   1 - .13   .87                             Average time for A = (8 + 10 + 9 + 11)/4 = 9.5 minutes
                                                                                                             Average time for B = (2 + 3 + 2 + 1 + 3)/5 = 2.2 minutes
                                      = 3.9 minutes
                                                                                                             Average time for C = (2 + 1 + 2 + 1)/4 = 1.5 minutes

© 2011 Pearson Education, Inc. publishing as Prentice Hall                         10 - 61   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                         10 - 62




                     Time Study Example 2                                                                         Time Study Example 2
      3. Compute the normal time for each element                                                  5. Compute the standard time for the job

                      Normal time = (Average observed time) x (Rating)                                                                                         Total normal time
                                                                                                                              Standard time =
                                                                                                                                                              1 - Allowance factor
                         Normal time for A = (9.5)(1.2) = 11.4 minutes
                         Normal time for B = (2.2)(1.05) = 2.31 minutes                                                                                       15.36
                         Normal time for C = (1.5)(1.10) = 1.65 minutes                                                                                   =           = 18.07 minutes
                                                                                                                                                              1 - .15

      4. Add the normal times to find the total normal time

                Total normal time = 11.40 + 2.31 + 1.65 = 15.36 minutes



© 2011 Pearson Education, Inc. publishing as Prentice Hall                         10 - 63   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                         10 - 64




                   Determine Sample Size                                                                        Determine Sample Size
                                                                                                                                                                                     2
                                                                                                                                                                                zs
          1. How accurate we want to be                                                                             Required sample size = n =
                                                                                                                                                                                hx
          2. The desired level of confidence                                                      where               h = accuracy level (acceptable error)
          3. How much variation exists within
          3 H          h   i ti   i t   ithi                                                                              desired in percent of the job element
                                                                                                                          expressed as a decimal
             the job elements                                                                                         z = number of standard deviations required
                                                                                                                          for the desired level of confidence
                                                                                                                      s = standard deviation of the initial sample
                                                                                                                      x = mean of the initial sample
                                                                                                                      n = required sample size

© 2011 Pearson Education, Inc. publishing as Prentice Hall                         10 - 65   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                         10 - 66




                                                                                                                                                                                                          11
10/16/2010




                   Determine Sample Size                                                                                      Time Study Example 3
                                                                                      2                                                 Desired accuracy with 5%
                                Common z Values                                  zs                                                     Confidence level = 95%
                       Required sample size = n =
                                                                                 hx                                                     Sample standard deviation = 1.0
                           Desired                                    z Value
                          Confidence
                                                                                                                                        Sample mean = 3.00
                                       (standard deviation required for
     where               h =(%)
                              accuracy level (acceptable error)
                                         desired level of confidence))
                              desired in percent of the job element                                                           h = .05       x = 3.00    s = 1.0
                            90.0                     1.65                                                                     z = 1.96 (from Table S10.1 or Appendix I)
                              expressed as a decimal
                         z =95.0
                              number of standard1.96  deviations required                                                                 zs
                                                                                                                                                    2
                            95.45 the desired level2.00confidence
                              for                     of                                                                      n=
                                                                                                                                          hx
                         s =99.0                     2.58
                              standard deviation of the initial sample
                            99.73                    3.00                                                                                                             2
                         x = mean of the initial sample                                                                                   1.96 x 1.0
                                                                                                                              n=                                          = 170.74 ≈ 171
                         n = required sample size                  Table 10.2                                                               .05 x 3

© 2011 Pearson Education, Inc. publishing as Prentice Hall                                     10 - 67   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                      10 - 68




                     Time Study Example 3                                                                                                               New Tools
      Variations                                                                                                          With PDA software, you can study
          If desired accuracy h is expressed as an absolute                                                               elements, time, performance rate, and
          amount, substitute e for hx, where e is the                                                                     statistical confidence intervals can be
          absolute amount of acceptable error                                                                             created,
                                    zs
                                        2
                                                                                                                          edited,,
                              n=                                                                                          managed,
                                     e
                                                                                                                          and logged
         When the standard deviation s is not provided,
         it must be computed
                                                                                                                          Reduces or
                                                                                                                          eliminates
                             ∑(xi - x)2                      ∑(Each sample observation - x)2                              the need
             s=                                    =                                                                      for data entry
                                n-1                               Number in sample - 1

© 2011 Pearson Education, Inc. publishing as Prentice Hall                                     10 - 69   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                      10 - 70




                          Predetermined Time                                                                                                            MTM Table
                              Standards
                  Divide manual work into small basic
                  elements that have established times
                  Can be done in a laboratory away from
                  the t l
                  th actual production operation
                               d ti          ti
                  Can be set before
                  the work is actually
                  performed
                  No performance
                  ratings are necessary
                                                                                                                                                                                           Figure 10.9
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                     10 - 71   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                      10 - 72




                                                                                                                                                                                                                   12
10/16/2010




                                       MTM Example                                                                                            Work Sampling
       Weight - less than 2 pounds                                                                                         Estimates percent of time a worker
       Conditions of GET - easy
       Place accuracy - approximate
                                                                                                                           spends on various tasks
       Distance range - 8 to 20 inches
                                                                                                                           Requires random observations to
                           Element Description                        Element         Time                                 record worker activity
      Get tube from rack                                                AA2            35
      Uncap, place on counter                                           AA2            35                                  Determines how employees allocate
      Get centrifuge tube, place at sample table                        AD2            45                                  their time
      Pour (3 seconds)                                                   PT            83
      Place tubes in rack (simo)                                        PC2            40
                                                                                                                           Can be used to set staffing levels,
                                                                       Total TMU      238                                  reassign duties, estimate costs, and
        .0006 x 238 = Total standard minutes = .14                                                                         set delay allowances
                                                                                   Table 10.4
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                      10 - 73   © 2011 Pearson Education, Inc. publishing as Prentice Hall                               10 - 74




                                    Work Sampling                                                                                             Work Sampling
       1. Take a preliminary sample to obtain                                                                    Determining the sample size
          estimates of parameter values
       2. Compute the sample size required                                                                                                                             z2 p(1 - p)
                                                                                                                                                             n=
                                                                                                                                                                           h2
       3. Prepare a schedule for random
       3 P            h d l f       d
          observations at appropriate times                                                                          where                    n = required sample size
                                                                                                                                              z = standard normal deviate for
       4. Observe and record worker activities                                                                                                    desired confidence level
                                                                                                                                              p = estimated value of sample
       5. Determine how workers spend their                                                                                                       proportion
          time                                                                                                                                h = acceptable error level in percent

© 2011 Pearson Education, Inc. publishing as Prentice Hall                                      10 - 75   © 2011 Pearson Education, Inc. publishing as Prentice Hall                               10 - 76




                Work Sampling Example                                                                                     Work Sampling Example
                                                                                                                      No. of
          Wants employees idle 25% of the time                                                                     Observations                                              Activity
          Sample should be accurate within 3%                                                                                485                   On the phone or meeting with a welfare client
          Wants to have 95.45% confidence in the results                                                                     126                   Idle
                                                        z2 p(1 - p)                                                           62                   Personal time
                                                     n=                                                                       23                   Discussions with supervisor
                                                            h2
                                                                                                                             137                   Filing, meeting, and computer data entry
             where                    n     =    required sample size
                                      z     =    2 for a 95.45% confidence level                                             833
                                      p     =    estimate of idle proportion = 25% = .25
                                      h     =    acceptable error of 3% = .03                                         All but idle and personal time are work related
                                                                                                                      Percentage idle time = (126 + 62)/833 = 22.6%
                                     (2)2 (.25)(.75)
                          n=                         = 833 observations                                               Since this is less than the target value of 25%,
                                          (.03)2                                                                      the workload needs to be adjusted
© 2011 Pearson Education, Inc. publishing as Prentice Hall                                      10 - 77   © 2011 Pearson Education, Inc. publishing as Prentice Hall                               10 - 78




                                                                                                                                                                                                             13
10/16/2010




                        Work Sampling Time                                                                                Work Sampling Time
                              Studies                                                                                           Studies
        Salespeople                                                                                                                                                    Startup/exercise
                                                                                                          Assembly-Line                                                      3%
                                                                                                          Employees
                                                                                                                                                                           Breaks and lunch
                                                      Sales in Travel                                                                                                            10%
                                                      person    20%
                                                       20%                                                                                                                         Dead time
                    Telephone
                    T l h
                      sales                                    Paperwork                                                                                                         between tasks
                       12%                                        17%                                                                                                                13%
                                                                                                                                                   Productive               Unscheduled tasks
                                                                           Lunch and                                                                  work
                                                                            personal                                                                                          and downtime
                                                                                                                                                      67%                          4%
                                                                              10%
                  Telephone                                                                                                                                              Cleanup
                  within firm                                               Meetings                                                                                       3%
                     13%                                                    and other
                                                                               8%

   Figure 10.10                                                                                      Figure 10.10

© 2011 Pearson Education, Inc. publishing as Prentice Hall                              10 - 79   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                    10 - 80




                                    Work Sampling                                                                                     Work Sampling
               Advantages of work sampling
                          Less expensive than time study                                                          Disadvantages of work sampling
                          Observers need little training                                                                    Does not divide work elements as
                                                                                                                            completely as time study
                          Studies can be delayed or interrupted
                          with little impact on results                                                                     Can yield biased results if observer
                                                                                                                            does not follow random pattern
                          Worker has little
                          chance to affect                                                                                  Less accurate, especially when
                          results                                                                                           job element times are short
                          Less intrusive

© 2011 Pearson Education, Inc. publishing as Prentice Hall                              10 - 81   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                    10 - 82




                         Ethics and the Work
                            Environment
                Fairness, equity, and ethics are
                important constraints of job design
                Important issues may relate to equal
                opportunity, equal pay for equal                                                              All rights reserved. No part of this publication may be reproduced, stored in a retrieval
                work, and safe working conditions                                                          system, or transmitted, in any form or by any means, electronic, mechanical, photocopying,
                                                                                                                    recording, or otherwise, without the prior written permission of the publisher.
                                                                                                                                       Printed in the United States of America.
                Helpful to work with government
                agencies, trade unions, insurers,
                and employees
© 2011 Pearson Education, Inc. publishing as Prentice Hall                              10 - 83   © 2011 Pearson Education, Inc. publishing as Prentice Hall                                    10 - 84




                                                                                                                                                                                                          14

More Related Content

What's hot (20)

Heizer om10 ch11_s-outsourching
Heizer om10 ch11_s-outsourchingHeizer om10 ch11_s-outsourching
Heizer om10 ch11_s-outsourching
 
Heizer om10 ch16-jit and lean operations
Heizer om10 ch16-jit and lean operationsHeizer om10 ch16-jit and lean operations
Heizer om10 ch16-jit and lean operations
 
Heizer om10 ch12-inventory
Heizer om10 ch12-inventoryHeizer om10 ch12-inventory
Heizer om10 ch12-inventory
 
Heizer om10 ch02
Heizer om10 ch02Heizer om10 ch02
Heizer om10 ch02
 
Heizer om10 ch08-location
Heizer om10 ch08-locationHeizer om10 ch08-location
Heizer om10 ch08-location
 
Heizer om10 ch03
Heizer om10 ch03Heizer om10 ch03
Heizer om10 ch03
 
Heizer om10 ch11-supply chain
Heizer om10 ch11-supply chainHeizer om10 ch11-supply chain
Heizer om10 ch11-supply chain
 
Heizer om10 ch13-aggregate planning
Heizer om10 ch13-aggregate planningHeizer om10 ch13-aggregate planning
Heizer om10 ch13-aggregate planning
 
Heizer om10 ch17-maintenance and reliability
Heizer om10 ch17-maintenance and reliabilityHeizer om10 ch17-maintenance and reliability
Heizer om10 ch17-maintenance and reliability
 
Heizer om10 mod_b-linear programming
Heizer om10 mod_b-linear programmingHeizer om10 mod_b-linear programming
Heizer om10 mod_b-linear programming
 
Heizer 17
Heizer 17Heizer 17
Heizer 17
 
Heizer om10 ch01 [operation and productivity]
Heizer om10 ch01 [operation and productivity]Heizer om10 ch01 [operation and productivity]
Heizer om10 ch01 [operation and productivity]
 
Heizer supp 06
Heizer supp 06Heizer supp 06
Heizer supp 06
 
Heizer 15
Heizer 15Heizer 15
Heizer 15
 
Heizer 16
Heizer 16Heizer 16
Heizer 16
 
Heizer 01
Heizer 01Heizer 01
Heizer 01
 
Heizer 04
Heizer 04Heizer 04
Heizer 04
 
Heizer 09
Heizer 09Heizer 09
Heizer 09
 
Heizer supp 07
Heizer supp 07Heizer supp 07
Heizer supp 07
 
Heizer om10 ch11_r
Heizer om10 ch11_rHeizer om10 ch11_r
Heizer om10 ch11_r
 

Similar to Heizer om10 ch10-work design

Heizer om10 ch10
Heizer om10 ch10Heizer om10 ch10
Heizer om10 ch10ryaekle
 
Dessler hrm12e ppt_04
Dessler hrm12e ppt_04Dessler hrm12e ppt_04
Dessler hrm12e ppt_04obeden
 
1 human resource management and its theoretical base
1   human resource management and its theoretical base1   human resource management and its theoretical base
1 human resource management and its theoretical baseKapil Chhabra
 
1 human resource management and its theoretical base
1   human resource management and its theoretical base1   human resource management and its theoretical base
1 human resource management and its theoretical baseKapil Chhabra
 
Hr audit
Hr auditHr audit
Hr auditSampath
 
Evidence-Based HR Management: What is it and what can we do about it?
Evidence-Based HR Management: What is it and what can we do about it?Evidence-Based HR Management: What is it and what can we do about it?
Evidence-Based HR Management: What is it and what can we do about it?Center for Evidence-Based Management
 
Training & Development Process
Training & Development ProcessTraining & Development Process
Training & Development ProcessSantoso Budi
 
Talent management and retention presentation
Talent management and retention presentationTalent management and retention presentation
Talent management and retention presentationDipty Jalan
 
Pesquisa Estudos CompetêNcias Rh Por Dave Ulrich 2007
Pesquisa Estudos CompetêNcias Rh Por Dave Ulrich 2007Pesquisa Estudos CompetêNcias Rh Por Dave Ulrich 2007
Pesquisa Estudos CompetêNcias Rh Por Dave Ulrich 2007Luciana Bernadete Felix
 

Similar to Heizer om10 ch10-work design (20)

Heizer 10
Heizer 10Heizer 10
Heizer 10
 
Heizer om10 ch10
Heizer om10 ch10Heizer om10 ch10
Heizer om10 ch10
 
Dessler hrm12e ppt_04
Dessler hrm12e ppt_04Dessler hrm12e ppt_04
Dessler hrm12e ppt_04
 
Trinity Acumen Services
Trinity Acumen ServicesTrinity Acumen Services
Trinity Acumen Services
 
1 human resource management and its theoretical base
1   human resource management and its theoretical base1   human resource management and its theoretical base
1 human resource management and its theoretical base
 
1 human resource management and its theoretical base
1   human resource management and its theoretical base1   human resource management and its theoretical base
1 human resource management and its theoretical base
 
Hr audit
Hr auditHr audit
Hr audit
 
Evidence-Based HR Management: What is it and what can we do about it?
Evidence-Based HR Management: What is it and what can we do about it?Evidence-Based HR Management: What is it and what can we do about it?
Evidence-Based HR Management: What is it and what can we do about it?
 
Executive Coaching
Executive CoachingExecutive Coaching
Executive Coaching
 
Hrm10e ch04
Hrm10e ch04Hrm10e ch04
Hrm10e ch04
 
Training & Development Process
Training & Development ProcessTraining & Development Process
Training & Development Process
 
Hrm10e ch10
Hrm10e ch10Hrm10e ch10
Hrm10e ch10
 
ABHISHEK CV
ABHISHEK CVABHISHEK CV
ABHISHEK CV
 
Hrm
HrmHrm
Hrm
 
Talent management and retention presentation
Talent management and retention presentationTalent management and retention presentation
Talent management and retention presentation
 
Pesquisa Estudos CompetêNcias Rh Por Dave Ulrich 2007
Pesquisa Estudos CompetêNcias Rh Por Dave Ulrich 2007Pesquisa Estudos CompetêNcias Rh Por Dave Ulrich 2007
Pesquisa Estudos CompetêNcias Rh Por Dave Ulrich 2007
 
Chapter 1
Chapter 1Chapter 1
Chapter 1
 
Chap12
Chap12Chap12
Chap12
 
7 manajemen sdm
7 manajemen sdm7 manajemen sdm
7 manajemen sdm
 
Ch17
Ch17Ch17
Ch17
 

Heizer om10 ch10-work design

  • 1. 10/16/2010 Human Resources, Job 10 Design, and Work Measurement Global Company Profile: Rusty Outline Wallace’s NASCAR Racing Team Human Resource Strategy for Competitive Advantage PowerPoint presentation to accompany Heizer and Render Constraints on Human Resource Strategy Operations Management, 10e Principles of Operations Management, 8e Labor Planning PowerPoint slides by Jeff Heyl Employment-Stability Policies Work Schedules Job Classifications and Work Rules © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 1 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 2 Outline – Continued Outline – Continued Job Design Methods Analysis Labor Specialization The Visual Workplace Job Expansion Labor Standards Psychological Components of Job Historical Experience Hi i lE i Design Time Studies Self-Directed Teams Predetermined Time Standards Motivation and Incentive Systems Work Sampling Ergonomics and the Work Environment Ethics © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 3 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 4 Learning Objectives Learning Objectives When you complete this chapter you When you complete this chapter you should be able to: should be able to: 1. Describe labor planning policies 5. Identify four ways of establishing labor standards 2. Identify the major issues in job design 6. Compute the normal and standard 3. Identify major ergonomic and work times in a time study environment issues 7. Find the proper sample size for a time 4. Use the tools of methods analysis study © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 5 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 6 1
  • 2. 10/16/2010 Rusty Wallace’s NASCAR Rusty Wallace’s NASCAR Racing Team Racing Team NASCAR racing became very Each position has very specific popular in the 1990s with huge work standards sponsorship and prize money Pit crews are highly organized High performance pit crews are a and go though rigorous physical key element of a successful race training team Pit stops are videotaped to look Pit crew members can earn for improvements $100,000 per year – for changing tires! © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 7 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 8 Rusty Wallace’s NASCAR Racing Team Human Resource Strategy The objective of a human resource strategy is to manage labor and design jobs so people are effectively and efficiently utilized © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 9 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 10 Constraints on Human Human Resource Strategy Resource Strategy Product strategy Process strategy 1. People should be effectively utilized • Skills needed • Technology • Talents needed • Machinery and within the constraints of other • Materials used equipment used • Safety operations management decisions • Safety 2. 2 People should have a reasonable quality Schedules • Time of day Individual differences When HUMAN Who • Strength and of work life in an atmosphere of mutual • Time of year RESOURCE fatigue (seasonal) • Information commitment and trust • Stability of STRATEGY processing and schedules response Location strategy Layout strategy • Climate • Fixed position • Temperature • Process • Noise • Assembly line • Light • Work cell • Air quality • Product © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 11 © 2011 Pearson Education, Inc. publishing as Prentice Hall Figure 10.1 10 - 12 2
  • 3. 10/16/2010 Labor Planning Labor Planning Employment Stability Policies Employment Stability Policies 1. Follow demand exactly 2. Hold employment constant Matches direct labor costs to Maintains trained workforce production Minimizes hiring, termination, and Incurs costs in hiring and unemployment costs termination, unemployment Employees may be underutilized insurance, and premium wages during slack periods Labor is treated as a variable cost Labor is treated as a fixed cost © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 13 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 14 Work Schedules Job Classification and Work Rules Standard work schedule Five eight-hour days Specify who can do what Flex-time Specify when they can do it Allows employees, within limits, to Specify under what conditions determine their own schedules they can do it Flexible work week Fewer but longer days Often result of union contracts Part-time Restricts flexibility in assignments Fewer, possibly irregular, hours and consequently efficiency of production © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 15 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 16 Job Design Labor Specialization Specifying the tasks that The division of labor into unique tasks constitute a job for an individual First suggested by Adam Smith in 1776 or a group 1. Development of dexterity 1. 1 Job specialization 2. Less loss of time 2. Job expansion 3. Development of specialized tools 3. Psychological components Later Charles Babbage (1832) added 4. Self-directed teams another consideration 5. Motivation and incentive systems 1. Wages exactly fit the required skill required © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 17 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 18 3
  • 4. 10/16/2010 Job Expansion Job Enlargement Enriched job Adding more variety to jobs Planning (Participate in a cross- function quality Intended to reduce boredom improvement team) associated with labor specialization Enlarged job Job enlargement Task #3 Present job Task #2 (Lock printed circuit (Manually insert and (Adhere labels Job rotation board into fixture for next operation) solder six resistors) to printed circuit board) Job enrichment Employee empowerment Control (Test circuits after assembly) Figure 10.2 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 19 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 20 Psychological Components Hawthorne Studies of Job Design They studied light levels, but discovered Human resource strategy requires productivity improvement was independent from lighting levels consideration of the psychological components Introduced psychology into the workplace p y gy p of job design The workplace social system and distinct roles played by individuals may be more important than physical factors Individual differences may be dominant in job expectation and contribution © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 21 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 22 Core Job Characteristics Job Design Continuum Self-directed Jobs should include the following teams characteristics Empowerment ection 1. Skill variety Self-dire Enrichment 2. Job identity 3. Job significance Enlargement 4. Autonomy Specialization 5. Feedback Job expansion Figure 10.3 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 23 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 24 4
  • 5. 10/16/2010 Self- Self-Directed Teams Self- Self-Directed Teams Group of empowered individuals To maximize effectiveness, managers should working together to reach a common goal Ensure those who have legitimate contributions are on the team May be organized for long-term or short-term objectives Provide management support P id t t Ensure the necessary training Effective because Endorse clear objectives and goals Provide employee empowerment Financial and non-financial rewards Ensure core job characteristics Meet individual psychological needs Supervisors must release control © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 25 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 26 Benefits of Teams and Limitations of Job Expanded Job Designs Expansion Improved quality of work life 1. Higher capital cost Improved job satisfaction 2. Individuals may p y prefer simple jobs p j Increased motivation I d i i 3. Higher wages rates for greater skills Allows employees to accept more 4. Smaller labor pool responsibility 5. Higher training costs Improved productivity and quality Reduced turnover and absenteeism © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 27 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 28 Limitations of Job Motivation and Incentive Expansion Systems Bonuses - cash or stock options 1. Higher capital cost Profit-sharing - profits for distribution to 2. Individuals may p y prefer simple jobs p j employees 3. Higher wages rates for greater skills Gain sharing - rewards for improvements 4. Smaller labor pool Incentive plans - typically based on 5. Higher training costs production rates Knowledge-based systems - reward for knowledge or skills © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 29 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 30 5
  • 6. 10/16/2010 Ergonomics and the Work Ergonomics and Work Environment Methods Ergonomics is the study of the Feedback to operators interface between man and The work machine environment Often called Illumination human factors Noise Operator input Temperature to machines Humidity © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 31 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 32 Recommended Levels of Levels of Illumination Illumination Task Condition Type of Task Illumination Type of or Area Level Illumination Small detail, Sewing, inspecting 100 Overhead extreme dark materials ceiling lights accuracy and desk lamp Normal detail, Reading, parts 20-50 Overhead prolonged assembly, ceiling lights periods general office work Good contrast, Recreational 5-10 Overhead fairly large facilities ceiling lights objects Large objects Restaurants, 2-5 Overhead stairways, ceiling lights warehouses Figure 10.4A © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 33 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 34 Decibel Levels Methods Analysis Focuses on how task is performed Used to analyze 1. Movement of individuals or material Flow diagrams and process charts 2. Activities of human and machine and crew activity Activity charts 3. Body movement Operations charts Table 10.4B © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 35 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 36 6
  • 7. 10/16/2010 Flow Diagram Flow Diagram Welding Machine 4 Welding From Machine 3 Storage bins p press mach. Paint P i t Paint P i t shop Machine 2 shop Mach. 3 Mach. 4 Machine 1 Machine 1 From press Storage mach. bins Mach. 2 Figure 10.5 (a) Figure 10.5 (b) © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 37 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 38 Activity Chart Process Chart Figure 10.5 (c) Figure 10.6 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 39 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 40 Operation Chart The Visual Workplace Use low-cost visual devices to share information quickly and accurately Displays and graphs replace p y g p p printouts and paperwork Able to provide timely information in a dynamic environment System should focus on improvement Figure 10.7 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 41 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 42 7
  • 8. 10/16/2010 The Visual Workplace The Visual Workplace Visual utensil holder A “3-minute service” Visual signals can take many forms encourages housekeeping clock reminds employees of the goal and serve many functions Present the big picture Performance Housekeeping Figure 10.8 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 43 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 44 The Visual Workplace The Visual Workplace Visual signals at the Visual kanbans reduce machine notify inventory and foster JIT support personnel Reorder Line/machine point stoppage Parts/ maintenance needed Quantities in bins indicate ongoing daily requirements All systems go and clipboards provide information on schedule Process specifications and Part A Part B Part C operating procedures are changes Andon posted in each work area Figure 10.8 Figure 10.8 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 45 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 46 Labor Standards Labor Standards Effective manpower planning is Started early in the 20th century dependent on a knowledge of the Important to both manufacturing labor required and service organizations Labor standards are the amount Necessary f d t N for determining i i of time required to perform a job staffing requirements or part of a job Important to labor incentive Accurate labor standards help systems determine labor requirements, costs, and fair work © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 47 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 48 8
  • 9. 10/16/2010 Meaningful Standards Help Labor Standards Determine 1. Labor content of items produced May be set in four ways: 2. Staffing needs p 1. Historical experience 3. 3 Cost and time estimates 2. Time studies 4. Crew size and work balance 3. Predetermined time standards 5. Expected production 4. Work sampling 6. Basis of wage incentive plans 7. Efficiency of employees © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 49 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 50 Historical Experience Time Studies How the task was performed last time Involves timing a sample of a worker’s performance and using Easy and inexpensive it to set a standard Data available from production Requires trained and experienced records or time cards observers Data is not objective and may be Cannot be set before the work is inaccurate performed Not recommended © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 51 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 52 Time Studies Time Studies 5. Compute average observed time 1. Define the task to be studied Sum of the times recorded 2. Divide the task into precise Average to perform each element observed = elements time Number of observations 3. Decide how many times to measure the task 6. Determine performance rating and normal time 4. Time and record element times and Average rating of performance Normal time = observed x Performance rating factor time © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 53 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 54 9
  • 10. 10/16/2010 Time Studies Rest Allowances Personal time allowance 7. Add the normal times for each 4% - 7% of total time for use of element to develop the total normal restroom, water fountain, etc. time for the task Delay allowance 8. Compute the standard time Based upon actual delays that occur Total normal time Fatigue allowance Standard time = 1 - Allowance factor Based on our knowledge of human energy expenditure © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 55 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 56 Rest Allowances Rest Allowances 1. Constant allowance (C) Use of force or muscular energy in (A) Personal allowance ……………... 5 lifting, pulling, pushing (B) Basic fatigue allowance ………… 4 Weight lifted (pounds) 2. Variable allowances: 20 …………………………………… 3 (A) Standing allowance ……………… 2 40……………………………………. 9 40 (B) Abnormal position 60……………………………………. 17 (i) Awkward (bending) ………… 2 (D) Bad light: (ii) Very awkward (lying, (i) Well below recommended…. 2 stretching) …………………… 7 (ii) Quite inadequate……………. 5 Table 10.1 Figure 10.1 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 57 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 58 Rest Allowances Rest Allowances (E) Atmospheric conditions (H) Mental strain: (heat and humidity) …………… 0-10 (i) Complex or wide span (F) Close attention: of attention.…………………….. 4 (i) Fine or exacting……………….. 2 (ii) Very complex………………….. 8 (ii) Very fine or very exacting…… 5 (I) Tediousness: (G) Noise level: (i) Tedious…………..……………… 2 (i) Intermittent—loud…………….. 2 (ii) Very tedious.…………………… 5 (ii) Intermittent—very loud or high-pitched………………... 5 Figure 10.1 Figure 10.1 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 59 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 60 10
  • 11. 10/16/2010 Time Study Example 1 Time Study Example 2 Average observed time = 4.0 minutes Allowance factor = 15% Worker rating = 85% Cycle Observed (in minutes) Allowance factor = 13% Performance Job Element 1 2 3 4 5 Rating (A) Compose and type letter 8 10 9 21* 11 120% Normal time = (Average observed time) x (Rating factor) (B) Type envelope address 2 3 2 1 3 105% = (4.0)(.85) (C) Stuff, stamp, seal, and 2 1 5* 2 1 110% = 3.4 minutes sort envelopes 1. Delete unusual or nonrecurring observations (marked with *) Normal time 3.4 3.4 2. Compute average times for each element Standard time = = = 1 - Allowance factor 1 - .13 .87 Average time for A = (8 + 10 + 9 + 11)/4 = 9.5 minutes Average time for B = (2 + 3 + 2 + 1 + 3)/5 = 2.2 minutes = 3.9 minutes Average time for C = (2 + 1 + 2 + 1)/4 = 1.5 minutes © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 61 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 62 Time Study Example 2 Time Study Example 2 3. Compute the normal time for each element 5. Compute the standard time for the job Normal time = (Average observed time) x (Rating) Total normal time Standard time = 1 - Allowance factor Normal time for A = (9.5)(1.2) = 11.4 minutes Normal time for B = (2.2)(1.05) = 2.31 minutes 15.36 Normal time for C = (1.5)(1.10) = 1.65 minutes = = 18.07 minutes 1 - .15 4. Add the normal times to find the total normal time Total normal time = 11.40 + 2.31 + 1.65 = 15.36 minutes © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 63 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 64 Determine Sample Size Determine Sample Size 2 zs 1. How accurate we want to be Required sample size = n = hx 2. The desired level of confidence where h = accuracy level (acceptable error) 3. How much variation exists within 3 H h i ti i t ithi desired in percent of the job element expressed as a decimal the job elements z = number of standard deviations required for the desired level of confidence s = standard deviation of the initial sample x = mean of the initial sample n = required sample size © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 65 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 66 11
  • 12. 10/16/2010 Determine Sample Size Time Study Example 3 2 Desired accuracy with 5% Common z Values zs Confidence level = 95% Required sample size = n = hx Sample standard deviation = 1.0 Desired z Value Confidence Sample mean = 3.00 (standard deviation required for where h =(%) accuracy level (acceptable error) desired level of confidence)) desired in percent of the job element h = .05 x = 3.00 s = 1.0 90.0 1.65 z = 1.96 (from Table S10.1 or Appendix I) expressed as a decimal z =95.0 number of standard1.96 deviations required zs 2 95.45 the desired level2.00confidence for of n= hx s =99.0 2.58 standard deviation of the initial sample 99.73 3.00 2 x = mean of the initial sample 1.96 x 1.0 n= = 170.74 ≈ 171 n = required sample size Table 10.2 .05 x 3 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 67 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 68 Time Study Example 3 New Tools Variations With PDA software, you can study If desired accuracy h is expressed as an absolute elements, time, performance rate, and amount, substitute e for hx, where e is the statistical confidence intervals can be absolute amount of acceptable error created, zs 2 edited,, n= managed, e and logged When the standard deviation s is not provided, it must be computed Reduces or eliminates ∑(xi - x)2 ∑(Each sample observation - x)2 the need s= = for data entry n-1 Number in sample - 1 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 69 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 70 Predetermined Time MTM Table Standards Divide manual work into small basic elements that have established times Can be done in a laboratory away from the t l th actual production operation d ti ti Can be set before the work is actually performed No performance ratings are necessary Figure 10.9 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 71 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 72 12
  • 13. 10/16/2010 MTM Example Work Sampling Weight - less than 2 pounds Estimates percent of time a worker Conditions of GET - easy Place accuracy - approximate spends on various tasks Distance range - 8 to 20 inches Requires random observations to Element Description Element Time record worker activity Get tube from rack AA2 35 Uncap, place on counter AA2 35 Determines how employees allocate Get centrifuge tube, place at sample table AD2 45 their time Pour (3 seconds) PT 83 Place tubes in rack (simo) PC2 40 Can be used to set staffing levels, Total TMU 238 reassign duties, estimate costs, and .0006 x 238 = Total standard minutes = .14 set delay allowances Table 10.4 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 73 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 74 Work Sampling Work Sampling 1. Take a preliminary sample to obtain Determining the sample size estimates of parameter values 2. Compute the sample size required z2 p(1 - p) n= h2 3. Prepare a schedule for random 3 P h d l f d observations at appropriate times where n = required sample size z = standard normal deviate for 4. Observe and record worker activities desired confidence level p = estimated value of sample 5. Determine how workers spend their proportion time h = acceptable error level in percent © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 75 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 76 Work Sampling Example Work Sampling Example No. of Wants employees idle 25% of the time Observations Activity Sample should be accurate within 3% 485 On the phone or meeting with a welfare client Wants to have 95.45% confidence in the results 126 Idle z2 p(1 - p) 62 Personal time n= 23 Discussions with supervisor h2 137 Filing, meeting, and computer data entry where n = required sample size z = 2 for a 95.45% confidence level 833 p = estimate of idle proportion = 25% = .25 h = acceptable error of 3% = .03 All but idle and personal time are work related Percentage idle time = (126 + 62)/833 = 22.6% (2)2 (.25)(.75) n= = 833 observations Since this is less than the target value of 25%, (.03)2 the workload needs to be adjusted © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 77 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 78 13
  • 14. 10/16/2010 Work Sampling Time Work Sampling Time Studies Studies Salespeople Startup/exercise Assembly-Line 3% Employees Breaks and lunch Sales in Travel 10% person 20% 20% Dead time Telephone T l h sales Paperwork between tasks 12% 17% 13% Productive Unscheduled tasks Lunch and work personal and downtime 67% 4% 10% Telephone Cleanup within firm Meetings 3% 13% and other 8% Figure 10.10 Figure 10.10 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 79 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 80 Work Sampling Work Sampling Advantages of work sampling Less expensive than time study Disadvantages of work sampling Observers need little training Does not divide work elements as completely as time study Studies can be delayed or interrupted with little impact on results Can yield biased results if observer does not follow random pattern Worker has little chance to affect Less accurate, especially when results job element times are short Less intrusive © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 81 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 82 Ethics and the Work Environment Fairness, equity, and ethics are important constraints of job design Important issues may relate to equal opportunity, equal pay for equal All rights reserved. No part of this publication may be reproduced, stored in a retrieval work, and safe working conditions system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Printed in the United States of America. Helpful to work with government agencies, trade unions, insurers, and employees © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 83 © 2011 Pearson Education, Inc. publishing as Prentice Hall 10 - 84 14