Pete's Market is a small local grocery store with only one checkout counter. Assume that shoppers arrive at the checkout lane according to a Poisson probability distribution, with an arrival rate of 13 customers per hour. The checkout service times follow an exponential probability distribution, with a service rate of 20 customers per hour. The manager’s service goal is to limit the waiting time prior to beginning the checkout process to no more than five minutes. Also the manager of Pete's Market wants to consider one of the following alternatives for improving service. Calculate the value of Wq for each alternative.
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Step 1In the above question its given that l = 13 customers per hour and the service rate is 29 customers. Step 2Now waiting time of the queue can be computed as follows:Wq= λ2/ μ(μ-λ)      =132/29(29-13)      = 169/464      = 0.364 ...