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Exam 18: Management of Waiting Lines

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Question 41

Multiple Choice

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A single channel queuing system has an average service time of eight minutes and an average time between arrivals of 10 minutes.The arrival rate is:

A) 6 per hour
B) 7.5 per hour
C) 8 per hour
D) 10 per hour
E) 12.5 per hour

F) A) and C)
G) C) and D)

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Question 42

True/False

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A dental office with two professionals (one dentist, one hygienist) who work together as a team would be an example of a multiple channel system.

A) True
B) False

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Question 43

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Customers arrive at a suburban ticket outlet at the rate of 14 per hour on Monday mornings.This can be described by a Poisson distribution.Selling the tickets and providing general information takes an average of 3 minutes per customer, and varies exponentially.There is 1 ticket agent on duty on Mondays.Determine each of the following: (A) system utilization (B) average number in line (C) average time in line (D) average time in the system

A queuing system has four crews with three members each.The number of "servers" is:

What is the average number of low priority items waiting in line for service?

The goal of queuing analysis is to minimize:

What is the overall average arrival rate?

Customers filter into a record shop at an average of 1 per minute (Poisson) where the service rate is 15 per hour (Poisson). Determine the following: (A) the average number of customers in the system with 8 servers (B) the minimum number of servers needed to keep the average time in the system to under 6 minutes

For a system that has a low utilization ratio, decreasing service capacity slightly will have only negligible effect on customer waiting time.

What is the average time that parties without player's cards wait to be seated?

Queue discipline requires a security presence to maintain order.

What is average time in the system for a high priority item?

The goal of queuing analysis is to balance the cost of providing a level of service capacity with the possible loss of business due to customers leaving the line or refusing to wait.

In a theme park like Disney world, reservation systems are a win-lose situation since only those holding reservations are satisfied.

Why is there waiting in an infinite source queuing system?

What is the average number of all items waiting in line for service?

As the ratio of arrival rate to service rate is increased, which of the following is likely?

If operators cost $15 per hour in wages and fringe benefits and machine downtime costs $75 per hour in lost production, what is the optimal number of operators for this bank of machines?

A single bay car wash with a Poisson arrival rate and an exponential service time has cars arriving an average of 10 minutes apart, and an average service time of four minutes.The system utilization is:

In an infinite source model, the average number being served is equal to the ratio of the arrival rate to the service rate.