A workstation has one maintenance mechanic to repair failed machines. We can think of the mechanic as the processor (scarce resource) and the machines awaiting repair as the jobs. Let us assume that six machines are down, with estimated repair times given here, and that no new machines fail.

Compute the flow time for each job using both the FCFS rule and the SPT rule, and compare the average flow times.

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Job (fix machine #) Processing time (hours) 1 2 3 4 4 10 3 7 2 5 6 96