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Question
Jack's Refrigeration Repair is under contract to repair, recondition, and/or refurbish commercial and industrial icemakers from restaurants, seafood processors, and similar organizations. Jack currently has five jobs to be scheduled, shown in the order in which they arrived.
| Job | Processing Time (hours) | Due (hours) |
| V | 20 | 50 |
| W | 10 | 35 |
| X | 50 | 90 |
| Y | 15 | 35 |
| Z | 55 | 75 |
(a) Complete the following table. (Show your supporting calculations below).
(b) Which dispatching rule has the best score for flow time?
(c) Which dispatching rule has the best score for work-in-process (jobs in the system)?
(d) Which dispatching rule has the best score for lateness?
| Dispatching Rule | Job Sequence | Average Flow Time | Average Number of Jobs | Average Lateness |
| FCFS | ||||
| SPT | ||||
| EDD | ||||
| CR |
Answer
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