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FCFS, SPT and EDD rules.

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The hickory company manufactures wooden desks. Management schedules overtime every weekend to reduce the backlog on the most popular models. The automatic routing machine is used to cut certain types of edges on the desktops the following orders need to be scheduled for the routing machine:

Order Estimated Machine time(hr) Due Date (hr from now)
1 10 12
2 3 8
3 15 18
4 9 20
5 7 21

The due dates reflect the need for the order to be at its next operation.
a) develop separate schedules by using the FCFS,SPT and EDD rules. Compare the schedules on the basis of average flow time,the average early time and average past due hours for any order.
b)For each schedule,calculate the average WIP inventory(in orders) and the average total inventory( in orders)
c) comment on the performance of the two rules relative to these measures

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Solution Summary

Solution contains schedules of overtime by using the FCFS,SPT and EDD rules and compares the schedules on the basis of average flow time,the average early time and average past due hours for any order.Calculations of the average WIP inventory(in orders) and the average total inventory( in orders) for each schedule are also given .

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