The drill press is a bottleneck operation. Currently, five jobs are waiting to be processed. Following are the available operations data. Assume that the number of remaining operations and the shop time remaining include the processing at the drill press.

a. Specify the priority for each job if the shop floor control system uses each of the following priority rules: SPT, S/RO, EDD, and CR.
b. For each priority rule, calculate the average flow time per job at the drill press.
c. Which of these priority rules would work best for priority planning with an MRP system? Why?

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Shop Time Operations Remaining (wk) Time Since Time to Processing Due Date (wk) Order Job Arrived (hr) Time (hr) Remaining AA 24 4 10 3 4 BB 16 16 4 21 10 CC 14 13 9. 23 12 DD 12 3 EE 10 12 5