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Which of the cost estimates & performance measures are not used for economic analysis of a queuing system?

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Which of the cost estimates & performance measures are not used for economic analysis of a queuing system?
  • ACost per server per unit of time
  • BCost per unit of time for a customer waiting in the system
  • CAverage number of customers in the system
  • DAverage waiting time of customers in the system
Correct answer: D
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Average waiting time of customers in the system

Average waiting time of customers in the system of the cost estimates & performance measures are not used for economic analysis of a queuing system. Queuing theory (or "queueing theory") examines every component of waiting in line to be served, including the arrival process, service process, number of servers, number of system places, and the number of customers—which might be people, data packets, cars, etc.