Question 1

The total cost curve:

Accepted Answer

A)   starts at zero and increases as service capacity increases.
B)   begins high and decreases as service capacity increases.
C)   starts high, declines, then increases again.
D)   remains relatively flat regardless of service capacity.
E)   starts at zero, increases rapidly, then declines slowly back to zero.F) C) and D)
G) None of the above

Question 2

The cost of customer waiting is easy to estimate, the number waiting multiplied by the wait cost per minute.

Accepted Answer

A) True 
 B)False

Question 3

A bank of 10 machines requires regular periodic service. Machine running time and service time are both exponential. Machines run for an average of 44 minutes between service requirements, and service time averages six minutes per machine. What is the probability that a machine will have to wait for service with two operators?

Accepted Answer

A)   .654
B)   .090
C)   .346
D)   .910
E)   .016F) A) and E)
G) A) and D)

Question 4

An alternative strategy to increase the capacity of a service system is:

Accepted Answer

A)   reducing the number of arrivals.
B)   increasing variability.
C)   increasing the processing ratE.
D)   reducing the number of servers.
E)   reducing the processing rate.F) All of the above
G) B) and E)

Question 5

The goal of waiting-line management is to eliminate customer waiting lines.

Accepted Answer

A) True 
 B)False

Question 6

Each of the following is notation for a waiting-line model presented in the textbook except:

Accepted Answer

A)   M/P/S.
B)   M/M/1.
C)   M/D/1.
D)   M/M/S.
E)   M/P/1.F) B) and D)
G) D) and E)

Question 7

A single-channel queuing system has an average service time of 16 minutes per customer, which is exponentially distributed. The manager is thinking of converting to a system with a constant service time of 16 minutes. The arrival rate will remain the same. The effect will be to:

Accepted Answer

A)   increase utilization.
B)   decrease utilization.
C)   increase the average waiting time.
D)   decrease the average waiting timE.
E)   not have any effect since the service time is unchanged.F) B) and C)
G) A) and E)

Question 8

Little's law states that the average number of people in a waiting line is the average customer arrival rate multiplied by the:

Accepted Answer

A)   average time in the system.
B)   average waiting timE.
C)   service time minus the waiting time.
D)   average number in line.
E)   waiting time.F) A) and C)
G) B) and E)

Question 9

In which of these settings would one be least likely to encounter first-come service?

Accepted Answer

A)   a fast-food restaurant
B)   a doctor's office
C)   a hotel check-in operation
D)   an emergency room
E)   a check-out lineF) C) and D)
G) D) and E)

Question 10

A bank of 10 machines requires regular periodic service. Machine running time and service time are both exponential. Machines run for an average of 44 minutes between service requirements, and service time averages six minutes per machine. What is the average number of machines down when there is one operator?

Accepted Answer

A)   1.49
B)   3.35
C)   4.40
D)   6.65
E)   8.51F) A) and B)
G) A) and C)

Question 11

In an infinite-source model, the system utilization is the ratio of the arrival rate to the service capacity.

Accepted Answer

A) True 
 B)False

Question 12

A restaurant at a popular Colorado casino provides priority service to player's card holders. The restaurant has 10 tables or booths where customers may be seated. The service time (time a booth or table is occupied)  averages 42 minutes once a party is seated. The customer arrival rate is 8 parties per hour, with the parties being equally divided between card holders and people without player's cards. On average, how many parties with player's cards are waiting to be seated?

Accepted Answer

A)   0.000
B)   0.027
C)   0.061
D)   2.827
E)   5.688F) D) and E)
G) A) and D)

Question 13

A multiple-channel system has customers arriving at an average rate of five per hour and an average service time of 40 minutes. The minimum number of servers for this system to be underloaded is:

Accepted Answer

A)   2.
B)   3.
C)   4.
D)   5.
E)   6.F) B) and D)
G) B) and E)

Question 14

To reduce waiting times by actively managing system constraints, managers could consider:
(I)  using temporary workers.
(II)  shifting demand from high-demand periods to low-demand periods.
(III)  offering more service variety.
(IV)  discovering bottlenecks.

Accepted Answer

A)   I and III only
B)   I, II, and IV only
C)   III only
D)   II and IV only
E)   IV onlyF) B) and C)
G) A) and E)

Question 15

A restaurant at a popular Colorado casino provides priority service to player's card holders. The restaurant has 10 tables or booths where customers may be seated. The service time (time a booth or table is occupied)  averages 42 minutes once a party is seated. The customer arrival rate is 8 parties per hour, with the parties being equally divided between card holders and people without player's cards. On average, how many parties without player's cards are waiting to be seated?

Accepted Answer

A)   0.000
B)   0.027
C)   0.061
D)   2.861
E)   5.688F) A) and D)
G) B) and D)

Question 16

Which of the following would tend to increase the difference between the actual time customers spent waiting and the perceived time spent waiting by those customers?
(I)  Lots of experience with the service on the part of customers
(II)  Anxiety on the part of customers
(III)  A pleasant physical environment for the customers

Accepted Answer

A)   I and II only
B)   I only
C)   II only
D)   III only
E)   I, II, and IIIF) All of the above
G) B) and D)

Question 17

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:

Accepted Answer

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 B)
G) C) and D)

Question 18

Although it is generally the case that service systems have enough capacity, waiting lines result when __________ exceeds capacity for periods of time.

Accepted Answer

A)   homogeneity
B)   variability
C)   price
D)   demand
E)   heterogeneityF) A) and E)
G) A) and D)

Question 19

A basic difference between infinite-source and finite-source queuing models is the:

Accepted Answer

A)   number of servers.
B)   average waiting time.
C)   arrival distribution.
D)   size of potential calling population.
E)   processing rate.F) C) and D)
G) B) and E)

Question 20

A ________ is one way of reducing perceived waiting time.

Accepted Answer

A)   bonus
B)   gatekeeper
C)   reservation
D)   diversion
E)   number calling systemF) C) and D)
G) B) and D)

Exam 24: Management of Waiting Lines

Each of the following is notation for a waiting-line model presented in the textbook except:

Correct Answer
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The goal of waiting-line management is to eliminate customer waiting lines.

Correct Answer
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Correct Answer
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Little's law states that the average number of people in a waiting line is the average customer arrival rate multiplied by the:

Correct Answer
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Correct Answer
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The cost of customer waiting is easy to estimate, the number waiting multiplied by the wait cost per minute.

Correct Answer
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An alternative strategy to increase the capacity of a service system is:

Correct Answer
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The total cost curve:

Correct Answer
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A ________ is one way of reducing perceived waiting time.

Correct Answer
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In an infinite-source model, the system utilization is the ratio of the arrival rate to the service capacity.

Correct Answer
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To reduce waiting times by actively managing system constraints, managers could consider: (I) using temporary workers. (II) shifting demand from high-demand periods to low-demand periods. (III) offering more service variety. (IV) discovering bottlenecks.

Correct Answer
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A single-channel queuing system has an average service time of 16 minutes per customer, which is exponentially distributed. The manager is thinking of converting to a system with a constant service time of 16 minutes. The arrival rate will remain the same. The effect will be to:

Correct Answer
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Correct Answer
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Correct Answer
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In which of these settings would one be least likely to encounter first-come service?

Correct Answer
verified

Correct Answer
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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:

Correct Answer
verified

A basic difference between infinite-source and finite-source queuing models is the:

Correct Answer
verified

A multiple-channel system has customers arriving at an average rate of five per hour and an average service time of 40 minutes. The minimum number of servers for this system to be underloaded is:

Correct Answer
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Although it is generally the case that service systems have enough capacity, waiting lines result when __________ exceeds capacity for periods of time.

Correct Answer
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Exam 24: Management of Waiting Lines

Each of the following is notation for a waiting-line model presented in the textbook except:

Correct AnswerverifiedShow Answer

The goal of waiting-line management is to eliminate customer waiting lines.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Little's law states that the average number of people in a waiting line is the average customer arrival rate multiplied by the:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The cost of customer waiting is easy to estimate, the number waiting multiplied by the wait cost per minute.

Correct AnswerverifiedShow Answer

An alternative strategy to increase the capacity of a service system is:

Correct AnswerverifiedShow Answer

The total cost curve:

Correct AnswerverifiedShow Answer

A ________ is one way of reducing perceived waiting time.

Correct AnswerverifiedShow Answer

In an infinite-source model, the system utilization is the ratio of the arrival rate to the service capacity.

Correct AnswerverifiedShow Answer

To reduce waiting times by actively managing system constraints, managers could consider: (I) using temporary workers. (II) shifting demand from high-demand periods to low-demand periods. (III) offering more service variety. (IV) discovering bottlenecks.

Correct AnswerverifiedShow Answer

A single-channel queuing system has an average service time of 16 minutes per customer, which is exponentially distributed. The manager is thinking of converting to a system with a constant service time of 16 minutes. The arrival rate will remain the same. The effect will be to:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In which of these settings would one be least likely to encounter first-come service?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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:

Correct AnswerverifiedShow Answer

A basic difference between infinite-source and finite-source queuing models is the:

Correct AnswerverifiedShow Answer

A multiple-channel system has customers arriving at an average rate of five per hour and an average service time of 40 minutes. The minimum number of servers for this system to be underloaded is:

Correct AnswerverifiedShow Answer

Although it is generally the case that service systems have enough capacity, waiting lines result when __________ exceeds capacity for periods of time.

Correct AnswerverifiedShow Answer

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