Question: Suppose that we have a system with three machines, each with failure rate 1 per day. Repair times have mean 2 hours, and repairs are

Suppose that we have a system with three machines, each with failure rate 1 per day. Repair times have mean 2 hours, and repairs are made by a single repair person. Suppose that it costs 400 dollars per day for a repair person (whether they are busy or not) and 10,000 dollars per day whenever the number of operating machines drops below two. (For example, if half of the time less than two machines are operating, then you pay 5,000 dollars per day.) Should a second repair person be added

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