Determine a schedule for these jobs using the critical ratio criterion and calculate the average lateness. Then develop an earliest due date sequence and calculate average lateness
Job Process Time Due Date
Job 1 15 23
Job 2 7 15
Job 3 12 34
Job 4 8 16
Job 5 11 27
Job 6 10 19
Job 7 13 28
What will be an ideal response?
Answer:
Critical Ratio Sequence
Job Process Time Due Date Critical Ratio Sequence Lateness
Job 1 15 23 1.53 1 0
Job 2 7 15 2.14 4 25
Job 3 12 34 2.83 7 42
Job 4 8 16 2 3 17
Job 5 11 27 2.45 6 37
Job 6 10 19 1.9 2 6
Job 7 13 28 2.15 5 25
The average lateness for this sequence is 152/7 = 21.71
Earliest Due Date
Job Process Time Due Date Sequence Lateness
Job 1 15 23 4 17
Job 2 7 15 1 0
Job 3 12 34 7 42
Job 4 8 16 2 0
Job 5 11 27 5 24
Job 6 10 19 3 6
Job 7 13 28 6 36
The average lateness for this sequence is 125/7 = 17.86
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