a vending machine at a city airport dispenses hot coffee, hot chocolate or hot tea in a constant service time of 20 seconds. customers arrive at the vending machine at a mean rate 60 per hour (poisson distributed). determine the average length of the waiting line and the average time a customer must wait? how busy are they? 45% 33.33% 50% 300%

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
Section12.5: Analytic Steady-state Queueing Models
Problem 9P
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a vending machine at a city airport
dispenses hot coffee, hot chocolate or hot
tea in a constant service time of 20
seconds. customers arrive at the vending
machine at a mean rate 60 per hour
(poisson distributed). determine the
average length of the waiting line and the
average time a customer must wait?
how busy are they?
45%
33.33%
50%
300%
Transcribed Image Text:a vending machine at a city airport dispenses hot coffee, hot chocolate or hot tea in a constant service time of 20 seconds. customers arrive at the vending machine at a mean rate 60 per hour (poisson distributed). determine the average length of the waiting line and the average time a customer must wait? how busy are they? 45% 33.33% 50% 300%
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