ABC Enterprises has five jobs that must be scheduled for production at a work center. Below...
ABC Enterprises has five jobs that must be scheduled for production at a work center. Below are the processing times and due dates for each job.
|
Job |
Processing Time |
Due Date |
|
1 |
7 |
14 |
|
2 |
5 |
21 |
|
3 |
3 |
10 |
|
4 |
2 |
7 |
|
5 |
6 |
9 |
Schedule the jobs by sequencing them using the Earliest Due Date
(EDD) priority rule.
What is the average flow time? Show your Work and round
your answer to one decimal point.
|
Job |
Processing Time (in days) |
Due Date |
Flow Time |
Schedule the jobs by sequencing them
using the Shortest Processing Time (SPT) priority rule.
What is the average flow time? Show your Work and round
your answer to one decimal point.
|
Job |
Processing Time (in days) |
Due Date |
Flow Time |
Homework Answers
EDD
| JOB | PROCESSING TIME | DUE TIME | FLOW TIME | JOB LATENESS |
| D | 2 | 7 | 0 + 2 = 2 | |
| E | 6 | 9 | 2 + 6 = 8 | |
| C | 3 | 10 | 8 + 3 = 11 | 1 |
| A | 7 | 14 | 11 + 7 = 18 | 4 |
| B | 5 | 21 | 18 + 5 = 23 | 2 |
TOTAL FLOW TIME = 2 + 8 + 11 + 18 + 23 = 62
AVERAGE COMPLETION TIME = FLOW TIME / N = 62 / 5 = 12.4
SPT
| JOB | PROCESSING TIME | DUE TIME | FLOW TIME | JOB LATENESS |
| D | 2 | 7 | 0 + 2 = 2 | |
| C | 3 | 10 | 2 + 3 = 5 | |
| B | 5 | 21 | 5 + 5 = 10 | |
| E | 6 | 9 | 10 + 6 = 16 | 7 |
| A | 7 | 14 | 16 + 7 = 23 | 9 |
TOTAL FLOW TIME = 2 + 5 + 10 + 16 + 23 = 56
AVERAGE COMPLETION TIME = FLOW TIME / N = 56 / 5 = 11.2
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