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A job shop consists of three machines and two repairmen. The amount of time a ma- chine works before breaking down is exponentially distributed with mean 10 hours. The amount of time it takes a single repairman to x a machine is exponentially distributed with mean 8 hours. Note that only a person repairs a broken machine. solve by markov chain

(a) What is the average number of machines not in use?

(b) What proportion of time are both repairmen busy?

(d) If a working machine provides the pro t of $ 18 per hour and the amount of $ 30 per hour should be given to a repairman, does the owner of a job shop keep only a single repairman?

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Operation Management, Management Studies

Category:- Operation Management
Reference No.:- M91879100

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