Question 1
The emergency room at a hospital estimates the following requirements for registered nurses (RNs) for the late night shift each week. Nurses work four consecutive days, then have off three days.
| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
| 3 | 4 | 2 | 2 | 3 | 6 | 4 |
Perform cyclical scheduling on the data. (Note that you must identify three-day patterns of minimum requirements). How many RNs are required? How much extra capacity is required?
Question 2
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?
e. What dispatching rule would
you select? Support your decision.
| Dispatching Rule | Job Sequence | Average Flow Time | Average Number of Jobs | Average Lateness |
| FCFS | | | | |
| SPT | | | | |
| EDD | | | | |
| CR | | | | |
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