Two troubleshooters handle service calls for 10 machines. The average time between service requirements is 18 days, and service time averages two days. Assume exponential distributions. While running, each machine can produce 1,500 pieces per day. Determine:
(A) the percentage of time troubleshooters are idle.
(B) each machine's net productivity.
(C) If troubleshooters represent a cost of $150 per day, and machine downtime cost is $600 per day, would another troubleshooter be justified? Explain.

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The Answer of Two troubleshooters handle service calls for 10 machines. The average time between service requirements is 18 days, and service time averages two days. Assume exponential distributions. While running, each machine can produce 1,500 pieces per day. Determine:
(A) the percentage of time troubleshooters are idle.
(B) each machine's net productivity.
(C) If troubleshooters represent a cost of $150 per day, and machine downtime cost is $600 per day, would another troubleshooter be justified? Explain.

Two Troubleshooters Handle Service Calls for 10 Machines