Homework Answers
Critical Ratio (CR) for job A = Job due date/ Processing Time = 5/3 = 1.67
CR for job B= 4/4 =1
CR for job C = 6/8 = 0.75
CR for job D = 8/5 = 1.60
So, the sequence of jobs would be from lowest CR to highest CR i.e. C, B, D, A
| Jobs | Process Time | Due Date | Lateness = Process Time - Due Date |
| C | 8 | 6 | 2 |
| B | 4+8=12 | 4 | 8 |
| D | 5 + 12 =17 | 8 | 9 |
| A | 3 + 17 =20 | 5 | 15 |
| Total | 57 | 34 |
Average Lateness = 34/5 = 6.77 = 7 days
Average Completion Time = 57/5 = 11.4 = 11 days
Percentage Utilization = Normal Time taken/ Actual Time taken due to scheduling = 20/57 = .35 = 35%
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