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Question 15.SP.2: A defense contractor in Dallas has six jobs awaiting process...

A defense contractor in Dallas has six jobs awaiting processing. Processing time and due dates are given in the table. Assume that jobs arrive in the order shown. Set the processing sequence according to FCFS and evaluate. Start date is day 1.

JOB JOB PROCESSING
TIME (DAYS)		 JOB DUE
DATE (DAYS)
A 6 22
B 12 14
C 14 30
D 2 18
E 10 25
F 4 34
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FCFS has the sequence A–B–C–D–E–F.

JOB
SEQUENCE		 JOB
PROCESSING
TIME		 FLOW TIME DUE DATE JOB LATENESS
A 6 6 22 0
B 12 18 14 4
C 14 32 30 2
D 2 34 18 16
E 10 44 25 19
F 4 48 34 14
48 182 55

1. Average completion time = 182/6 = 30.33 days
2. Average number of jobs in system = 182/48 = 3.79 jobs
3. Average job lateness = 55/6 = 9.16 days
4. Utilization = 48/182 = 26.4%

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