Question: 9.3.2 In operating a queueing system with Poisson arrivals at a rate of D 1 per unit time and a single server, you have

9.3.2 In operating a queueing system with Poisson arrivals at a rate of D 1 per unit time and a single server, you have a choice of server mechanisms. Method A has a mean service time of D 0:5 and a variance in service time of 2 D 0:2, while Method B has a mean service time of D 0:4 and a variance of 2 D 0:9.

In terms of minimizing the waiting time of a typical customer, which method do you prefer? Would your answer change if the arrival rate were to increase significantly?

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