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winterrs12
29.02.2020 •
Business
At Tony and Cleo’s bakery, one kind of birthday cake is offered. It takes 15 minutes to decorate this particular cake, and the job is performed by one particular baker. In fact, it is all this baker does. What mean time between arrivals (exponentially distributed) can be accepted if the mean length of the queue for decorating is not to exceed five cakes?
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Ответ:
Explanation:
Average length of queue, Lq = λ^2/μ/(μ-λ)
μ is service rate, λ is arrival rate
Mean time to service = 15 minutes (decoration)
Service rate, μ = 60 / 15 = 4 per hour
It is given that the mean length of the queue for decorating is not to exceed five cakes, Lq = λ^2/μ/(μ-λ) = 5
λ^2/4/(4-λ) = 5
λ = 3.4164 per hour
Mean time between arrivals = 60 / 3.4164 = 17.56 minutes
The minimum acceptable mean time between arrivals = 17.56 minutes
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