chapter15solutions

chapter15solutions - CHAPTER 15 DISCUSSION QUESTIONS 1....

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CHAPTER 15 DISCUSSION QUESTIONS 1. Five priority sequencing rules are: n First come, first served (FCFS); or First in, first out (FIFO): Jobs are sequenced in the order in which they arrive at the workstation. n Earliest due date (EDD): Jobs are sequenced in the order in which they are due for delivery to the customer. n Shortest processing time (SPT): Jobs are sequenced in order of the processing time required at the workstation, with the job requiring the least processing time at the workstation scheduled first. n Longest processing time (LPT): Jobs are sequenced in order of the processing time required at the workstation, with the job requiring the longest processing time at the workstation scheduled first. n Critical ratio (CR): Jobs are sequenced in order of increasing critical ratio (the ratio of time required by work left to be done to time left to do the work ) 2. Johnson’s rule is used to sequence several jobs through two or three work centers. 6. The are a number of criteria for evaluating job sequencing rules. Criteria discussed in the text include: n Average job completion time n Average number of jobs in the system n Average job lateness. Additional criteria include: average wait time, average total completion time, and variance in completion times.
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This note was uploaded on 02/15/2012 for the course BA 252 taught by Professor Jamescampbell during the Winter '03 term at UMSL.

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chapter15solutions - CHAPTER 15 DISCUSSION QUESTIONS 1....

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