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Rina's Electronics Corporation retains a service crew to repair machine breakdowns that occur on average ?= 3 per 8-hour workday (approximately Poisson in nature). The crew can service an average of m = 10 machines per workday, with a repair time distribution that resembles the exponential distribution.

a) What is the utilization rate of this service system?

b) What is the average downtime for a broken machine?

c) How many machines are waiting to be serviced at any given time?

d) What is the probability that more than 1 machine is in the system?

The probability that more than 2 are broken and waiting to be repaired or being serviced?

More than 3?

 

More than 4?

Operation Management, Management Studies

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