The following table shows orders to be processed at a machine shop as of 8:00 a.m. Monday. The jobs have different operations they must go through. Processing times are in days. Jobs are listed in order of arrival.
| Job |
Processing
Time (Days) |
Due Date
(Days) |
Remaining Number
of Operations |
| A |
8 |
20 |
2 |
| B |
10 |
18 |
4 |
| C |
5 |
25 |
5 |
| D |
11 |
17 |
3 |
| E |
9 |
35 |
4 |
|
a. Determine the processing sequence at the first work center using each of these rules: (1) First come, first served, (2) Slack per operation.
| |
|
| Sequence for First come, first served |
(Click to select)A-B-C-D-EB-D-C-A-EC-A-B-D-ED-A-C-B-EE-A-B-C-D |
| Sequence for Slack per operation |
(Click to select)A-B-C-D-EB-D-C-A-EC-A-B-D-ED-A-C-B-EE-A-B-C-D |
|
b. Compute the effectiveness of each rule using each of these measures: (1) average completion time, (2) average number of jobs at the work center. (Round your answers to 2 decimal places.)
| |
First Come, First Served |
Slack per Operation |
| Average completion time |
|
|
| Average number of jobs |
|
|
|