Question 1

The point that minimizes total queuing system costs is that point where waiting costs and capacity costs are equal.

Accepted Answer

A) True 
 B)False

Question 2

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. 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?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) None of the above
G) B) and D)

Question 3

When the waiting cost incurred likely varies based on some customer characteristic, an appropriate queuing model is

Accepted Answer

A)  single channel, single phase.
B)  single channel, multiple phase.
C)  multiple channel, single priority.
D)  multiple channel, multiple phase.
E)  multiple channel, multiple priority.F) None of the above
G) B) and D)

Question 4

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. What is the average time that player's card holders wait to be seated?

Accepted Answer

A)  approx. 24 seconds
B)  approx. 55 seconds
C)  approx. 4 minutes
D)  approx. 40 minutes
E)  approx. 2 hoursF) A) and E)
G) A) and D)

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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) A) and E)
G) B) and D)

Question 7

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) B) and C)
G) A) and C)

Question 8

An approach to reducing the variability in processing times might include greater standardization.

Accepted Answer

A) True 
 B)False

Question 9

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 E)
G) D) and E)

Question 10

A system has one service facility that can service 10 customers per hour. The customers arrive at a variable rate, which averages six per hour. Since there is excess capacity, no waiting lines will form.

Accepted Answer

A) True 
 B)False

Question 11

The design of a service system often is used by management to _____________ the cost of capacity in relation to the expected cost of customers waiting.

Accepted Answer

A)  eliminate
B)  zeroize
C)  maximize
D)  minimize
E)  balanceF) D) and E)
G) A) and C)

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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) B) and C)

Question 14

All infinite-source queuing models require the system utilization to be less than 1.0.

Accepted Answer

A) True 
 B)False

Question 15

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) A) and B)
G) All of the above

Question 16

If a firm has reached the point at which further reducing waiting time is not economically feasible, reducing the ______________ is sometimes attractive.

Accepted Answer

A)  channels
B)  perceived service time
C)  capacity underload
D)  perceived waiting time
E)  system underutilizationF) B) and D)
G) B) and E)

Question 17

The queuing models discussed in the text apply only to steady-state conditions. Steady state exists only when customers arrive at a steady rate; that is, without any variability.

Accepted Answer

A) True 
 B)False

Question 18

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) A) and B)
F) None of the above

Question 19

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)  .000
B)  .027
C)  .061
D)  2.827
E)  5.688F) None of the above
G) A) and B)

Question 20

The value of standardizing some or all of a service is demonstrated by the shorter wait times observed in models with

Accepted Answer

A)  constant demand rates.
B)  finite queues.
C)  infinite sources.
D)  finite sources.
E)  constant service times.F) B) and D)
G) A) and D)

Exam 18: Management of Waiting Lines

All infinite-source queuing models require the system utilization to be less than 1.0.

Correct Answer
verified

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

Correct Answer
verified

The point that minimizes total queuing system costs is that point where waiting costs and capacity costs are equal.

Correct Answer
verified

The total cost curve

Correct Answer
verified

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

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
verified

Correct Answer
verified

The queuing models discussed in the text apply only to steady-state conditions. Steady state exists only when customers arrive at a steady rate; that is, without any variability.

Correct Answer
verified

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
verified

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

Correct Answer
verified

When the waiting cost incurred likely varies based on some customer characteristic, an appropriate queuing model is

Correct Answer
verified

Correct Answer
verified

If a firm has reached the point at which further reducing waiting time is not economically feasible, reducing the ______________ is sometimes attractive.

Correct Answer
verified

An approach to reducing the variability in processing times might include greater standardization.

Correct Answer
verified

Correct Answer
verified

A system has one service facility that can service 10 customers per hour. The customers arrive at a variable rate, which averages six per hour. Since there is excess capacity, no waiting lines will form.

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

The design of a service system often is used by management to _____________ the cost of capacity in relation to the expected cost of customers waiting.

Correct Answer
verified

The value of standardizing some or all of a service is demonstrated by the shorter wait times observed in models with

Correct Answer
verified

Exam 18: Management of Waiting Lines

All infinite-source queuing models require the system utilization to be less than 1.0.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The point that minimizes total queuing system costs is that point where waiting costs and capacity costs are equal.

Correct AnswerverifiedShow Answer

The total cost curve

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

The queuing models discussed in the text apply only to steady-state conditions. Steady state exists only when customers arrive at a steady rate; that is, without any variability.

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

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

Correct AnswerverifiedShow Answer

When the waiting cost incurred likely varies based on some customer characteristic, an appropriate queuing model is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If a firm has reached the point at which further reducing waiting time is not economically feasible, reducing the ______________ is sometimes attractive.

Correct AnswerverifiedShow Answer

An approach to reducing the variability in processing times might include greater standardization.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A system has one service facility that can service 10 customers per hour. The customers arrive at a variable rate, which averages six per hour. Since there is excess capacity, no waiting lines will form.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The design of a service system often is used by management to _____________ the cost of capacity in relation to the expected cost of customers waiting.

Correct AnswerverifiedShow Answer

The value of standardizing some or all of a service is demonstrated by the shorter wait times observed in models with

Correct AnswerverifiedShow Answer

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