Questions
Homework:Ch 11 Homework
Multiple fill-in-the-blank
Part 1Currently a company that designs Web sites has five customers in its backlog. The time since the order arrived, processing time, and promised due dates are given in the following table. The customers are ready to be scheduled today, which is the start of day 190190. [table] | Copy to Clipboard | | + [/table] [table] Customer | Time Since Order Arrived(days ago) | ProcessingTime (days) | Due Date(days fromnow) A | 88 | 1212 | 5050 B | 66 | 1010 | 6666 C | 33 | 2424 | 5858 D | 22 | 3232 | 100100 E | 1010 | 2020 | 2626 [/table]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.Part 2Using the FCFS (first come, first served) decision rule for sequencing the customers, the order is:[table] Sequence | 1 | 2 | 3 | 4 | 5 Customer | E Your answer is correct. You answered E. | A Your answer is correct. You answered A. | B Your answer is correct. You answered B. | C Your answer is correct. You answered C. | D Your answer is correct. You answered D. [/table]Part 3Using the EDD (earliest due date) decision rule for sequencing the customers, the order is (to resolve a tie, use the order in which the jobs were received):[table] Sequence | 1 | 2 | 3 | 4 | 5 Customer | E Your answer is correct. You answered E. | A Your answer is correct. You answered A. | C Your answer is correct. You answered C. | B Your answer is correct. You answered B. | D Your answer is correct. You answered D. [/table]Part 4The average flow time and average days past due for each option are: (Enter your responses rounded to one decimal place.)[table] Rule | Average Flow Time | Average Days Past Due EDD | 60.2 60.2 | 0.0 0.0 FCFS | 57.4 57.4 | 1.6 1.6 [/table]Part 5b. On the basis of average flow time, which rule gives the best schedule? [input] ▼ empty selection
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Step-by-Step Analysis
To approach Part 5, we first recall what the metric 'average flow time' means: it is the average time from when a job arrives to when it completes, across all jobs.
In Part 4, the computed results show two candidate rules with their respective average flow times:
- EDD (earliest due date): Average Flow Time = 60.2
- FCFS (first-come, first-served): Average Flow Time =......Login to view full explanationLog in for full answers
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