The Mowry Machine Shop still has five jobs to be processed as of 8 A.M. today (day 23) at its bottleneck operation. The time since the order arrived, processing time, and promised due dates are given in the following table. The jobs are listed in the order of arrival. Job Time Since Order Arrived (days ago) Processing Time (days) Due Date (days from now) A 11 10 22 B 10 8 13 C 8 4 19 D 6 4 16 E 1 3 30 a. Develop separate schedules by using the FCFS and EDD rules. Compare the schedules on the basis of average flow time and average days past due. Using the FCFS (first come, first served) decision rule for sequencing the jobs, the order is: Sequence 1 2 3 4 5 Job A B C D E Using the EDD (earliest due date) decision rule for sequencing the jobs, the order is (to resolve a tie, use the order in which the jobs were received): Sequence 1 2 3 4 5 Job B D C A E The average flow time and average days past due for each option are: (Enter your responses rounded to one decimal place.) Rule Average Flow Time Average Days Past Due EDD ? ? FCFS ? ?

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Question

The Mowry Machine Shop still has five jobs to be processed as of 8 A.M. today (day

23)

at its bottleneck operation. The time since the order arrived, processing time, and promised due dates are given in the following table. The jobs are listed in the order of arrival.

Job	Time Since Order Arrived (days ago)	Processing Time (days)	Due Date (days from now)
A	11	10	22
B	10	8	13
C	8	4	19
D	6	4	16
E	1	3	30

a. Develop separate schedules by using the FCFS and EDD rules. Compare the schedules on the basis of average flow time and average days past due.

Using the FCFS (first come, first served) decision rule for sequencing the jobs, the order is:

Sequence	1	2	3	4	5
Job	A	B	C	D	E

Using the EDD (earliest due date) decision rule for sequencing the jobs, the order is (to resolve a tie, use the order in which the jobs were received):