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. 
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.

Question 2

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

Question 3

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

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. 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)  5.688 
A)  0.000 
B)  0.027 
C)  0.061 
D)  2.861 
E)  5.688

Question 5

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

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

Question 7

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)  5.688 
A)  0.000 
B)  0.027 
C)  0.061 
D)  2.827 
E)  5.688

Question 8

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 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. 
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.

Question 10

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. 
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.

Question 11

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

Question 12

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)  8.51 
A)  1.49 
B)  3.35 
C)  4.40 
D)  6.65 
E)  8.51

Question 13

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

Question 14

A ________ is one way of reducing perceived waiting time.

Accepted Answer

A)  bonus 
B)  gatekeeper 
C)  reservation 
D)  diversion 
E)  number calling system 
A)  bonus 
B)  gatekeeper 
C)  reservation 
D)  diversion 
E)  number calling system

Question 15

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

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

Question 17

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)  heterogeneity 
A)  homogeneity 
B)  variability 
C)  price 
D)  demand 
E)  heterogeneity

Question 18

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. 
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.

Question 19

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 20

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

The total cost curve:

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

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:

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

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:

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

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:

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

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

A ________ is one way of reducing perceived waiting time.

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.

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

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

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

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

Introduction to Operations Management

Competitiveness

Forecasting

Product and Service Design

RELIABILITY – Static

Strategic Capacity Planning for Products and Services

Decision Theory– Static

Process Selection and Facility Layout

Work Design and Measurement

learning curve– Static

Location Planning and Analysis

The Transportation Model– Static

Management of Quality

Quality Control

Acceptance Sampling– Static

Aggregate Planning and Master Scheduling

MRP and ERP

Inventory Management

JIT and Lean Operations

Maintenance– Static

Supply Chain Management

Scheduling

Project Management

Linear Programming

Filters

Exam 24: Management of Waiting Lines

The total cost curve:

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

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:

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

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:

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

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:

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

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

A ________ is one way of reducing perceived waiting time.

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.

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

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

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

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

Introduction to Operations Management

Competitiveness

Forecasting

Product and Service Design

RELIABILITY – Static

Strategic Capacity Planning for Products and Services

Decision Theory– Static

Process Selection and Facility Layout

Work Design and Measurement

learning curve– Static

Location Planning and Analysis

The Transportation Model– Static

Management of Quality

Quality Control

Acceptance Sampling– Static

Aggregate Planning and Master Scheduling

MRP and ERP

Inventory Management

JIT and Lean Operations

Maintenance– Static

Supply Chain Management

Scheduling

Project Management

Linear Programming

Filters