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This chapter explores the process design analysis, which involves calculating the objectives, sequence of activities, task allocation, capacity, and variability effects. It includes various process mapping symbols and examples of different process configurations. Queuing analysis and the relationship between process utilization and the number of units waiting to be processed are also discussed.
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Chapter 5 Process design 2 – analysis
Figure 5.1 Process design – analysis involves calculating the details of the process, in particular its objectives, sequence of activities, allocation of tasks and capacity, and its ability to incorporate the effects of variability
Figure 5.2 'Micro' process performance objectives and process design factors
Figure 5.4 Process map for ‘enquire to delivery’ process at stage lighting operation
Figure 5.5 The ‘supply and install’ operations process mapped at three levels
Figure 5.6 The ‘collect and check’ process mapped to show different levels of process visibility
Figure 5.7 Customer experience map of a visit for an X-ray investigation
Figure 5.8 Precedence diagram showing the relationship between activities for the computer test and repair task
Figure 5.9 Long-thin arrangement of stages for the ‘computer test and repair’ task
Figure 5.10 Intermediate configurations for the ‘computer test and repair’ task
Figure 5.11 The ‘short-fat’ configurations of stages for the ‘computer test and repair’ task
Figure 5.12 Balancing loss is that proportion of the time invested in processing the product or service that is not used productively
Figure 5.13 Processing time variability in a synchronised process. Cycle time will need to accommodate the longest activity time at any of the stages
Figure 5.14 The relationship between process utilisation and number of units waiting to be processed for no arrival time or activity time variability
Figure 5.15 Units arriving at a process with variable arrival times and a constant activity time (10 min)
Figure 5.16 The relationship between process utilisation and number of units waiting to be processed for the variable arrival times in the example
Figure 5.17 The relationship between process utilisation and number of units waiting to be processed for variable arrival and activity times
