Operations Research - Study Mode
[#316] Which of the following characteristics apply to queuing system?
Correct Answer
(C) Both a & b
Explanation
Solution: Customer population and Arrival process characteristics apply to queuing system. Queuing theory is the mathematical study of the congestion and delays of waiting in line. 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.
[#317] Which of the following is not a key operating characteristics apply to queuing system?
Correct Answer
(D) None of the above
Explanation
Solution: In designing a good queuing system, it is necessary to have good information about the model. The characteristics listed below would provide sufficient information. 1. The arrival pattern. 2. The service mechanism. 3. The queue discipline. 4. The number of customers allowed in the system. 5. The number of service channels.
[#318] Priority queue discipline may be classified as.
Correct Answer
(C) Pre-emptive or non-pre-emptive
Explanation
Solution: Priority queue discipline may be classified as Pre-emptive or non-pre-emptive. For priority queues, one must distinguish pre-emptive service from non-pre-emptive service. A service discipline is said to be non-pre-emptive if, once the service to a customer is started, it is not disrupted until the whole service requirement is completed.
[#319] The calling population is assumed to be infinite when.
Correct Answer
(A) Arrivals are independent of each other
Explanation
Solution: The calling population is assumed to be infinite when arrivals are independent of each other. The population of potential customers is refered to as the calling population. The calling population can be finite or infinite. In the systems with large population, we usually assume the population is infinite.
[#320] Which of the cost estimates & performance measures are not used for economic analysis of a queuing system?
Correct Answer
(D) Average waiting time of customers in the system
Explanation
Solution: 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.