Job Flow Time (min) 1 2 3 4 5 6 minutes Makespan: Average flow time: minutes In what order would the jobs be processed using the SPT rule? The SPT sequence is -Select- -Select---Select-- -Select- -Select-- -Select- Compute the average flow time after each job is completed. Round your answer to the nearest whole number.

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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The following six jobs are to be scheduled on a single machine:

| Job | 1   | 2   | 3   | 4   | 5   | 6   |
|-----|-----|-----|-----|-----|-----|-----|
| Processing time (min.) | 70  | 160 | 220 | 90  | 130 | 110 |

### a. Processing Jobs in FCFS Order
Suppose the jobs are processed in First-Come, First-Served (FCFS) numerical order. Compute the makespan, flow time for each job, and overall average flow time. Round your answers to the nearest whole number.

| Job | Flow Time (min) |
|-----|-----------------|
| 1   |                 |
| 2   |                 |
| 3   |                 |
| 4   |                 |
| 5   |                 |
| 6   |                 |

- **Makespan:** ________ minutes
- **Average flow time:** ________ minutes

### b. Processing Jobs in SPT Order
In what order would the jobs be processed using the Shortest Processing Time (SPT) rule?

The SPT sequence is: 

- _________
- _________
- _________
- _________
- _________
- _________

Compute the average flow time after each job is completed. Round your answer to the nearest whole number.

- **Average flow time:** ________ minutes
Transcribed Image Text:The following six jobs are to be scheduled on a single machine: | Job | 1 | 2 | 3 | 4 | 5 | 6 | |-----|-----|-----|-----|-----|-----|-----| | Processing time (min.) | 70 | 160 | 220 | 90 | 130 | 110 | ### a. Processing Jobs in FCFS Order Suppose the jobs are processed in First-Come, First-Served (FCFS) numerical order. Compute the makespan, flow time for each job, and overall average flow time. Round your answers to the nearest whole number. | Job | Flow Time (min) | |-----|-----------------| | 1 | | | 2 | | | 3 | | | 4 | | | 5 | | | 6 | | - **Makespan:** ________ minutes - **Average flow time:** ________ minutes ### b. Processing Jobs in SPT Order In what order would the jobs be processed using the Shortest Processing Time (SPT) rule? The SPT sequence is: - _________ - _________ - _________ - _________ - _________ - _________ Compute the average flow time after each job is completed. Round your answer to the nearest whole number. - **Average flow time:** ________ minutes
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