Seven jobs are to be processed on two machines; each job must follow the same sequence beginning with machine A and moving to machine B. The processing time in hours is as follows:
Job 1 2 3 4 5 6 7
Machine A 10 12 13 7 14 5 16
Machine B 15 11 8 9 6 7 16
i) Find the sequence that will minimize total completion time.
ii) Construct a chart of the resulting sequence and find machine B’s idle time.


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Job 1 2 3 4 5 6 7
Machine A 10 12 13 7 14 5 16
Machine B 15 11 8 9 6 7 16
i) Find the sequence that will minimize total completion time.
ii) Construct a chart of the resulting sequence and find machine B’s idle time.
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