Question 1

The finite-source queuing model is appropriate when the potential calling population is relatively large.

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

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

Question 4

In an infinite source model, the average time in line is equal to the average number in line divided by the arrival rate.

Accepted Answer

A) True 
 B)False

Question 5

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 underutilization 
A) channels 
B) perceived service time 
C) capacity underload 
D) perceived waiting time 
E) system underutilization

Question 6

A restaurant that implements a limited menu and a "no substitutions" policy during peak dining hours is practicing _____________ with respect to waiting line management.

Accepted Answer

A) demand shifting 
B) queuing psychology 
C) service standardization 
D) service phasing 
E) outsourcing 
A) demand shifting 
B) queuing psychology 
C) service standardization 
D) service phasing 
E) outsourcing

Question 7

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 8

The most commonly used queuing models assume that the arrival rate can be described by a Poisson distribution.

Accepted Answer

A) True 
 B)False

Question 9

Which one of the following measures of system performance is a key measure with respect to customer satisfaction?

Accepted Answer

A) average number of customers waiting in line 
B) system utilization 
C) average number of customer in the calling population 
D) probability of a server being busy 
E) capacity costs per hour 
A) average number of customers waiting in line 
B) system utilization 
C) average number of customer in the calling population 
D) probability of a server being busy 
E) capacity costs per hour

Question 10

What is the average machine downtime with two operators?

Accepted Answer

A) 1.71 minutes 
B) 3.46 minutes 
C) 6.25 minutes 
D) 7.71 minutes 
E) 9.46 minutes 
A) 1.71 minutes 
B) 3.46 minutes 
C) 6.25 minutes 
D) 7.71 minutes 
E) 9.46 minutes

Question 11

A multiple channel system assumes that each server will have its own waiting line and line changing is not permitted.

Accepted Answer

A) True 
 B)False

Question 12

A system has one service facility that can service 10 customers per hour.The customers arrive at a variable rate, which averages 6 per hour.Since there is excess capacity, no waiting lines will form.

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. 
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 14

A multiple channel queuing system with a Poisson arrival rate and exponential service time has an average arrival rate of 4 customers per hour and an average service time of 18 minutes per customer.The minimum number of servers required to avoid an overloaded system is:

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 15

When the waiting cost incurred by customers likely varies, 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 
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

Question 16

Compared to a single channel system with exponential service time, the same system with a constant service time will have an average of one-half the number of customers waiting in the system.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

The answer of What is the average number of high...

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) All of the above are viable options. 
A) Reducing the number of arrivals. 
B) Increasing variability. 
C) Increasing the processing rate. 
D) Reducing the number of servers. 
E) All of the above are viable options.

Question 19

Compared to a single channel a system with exponential service time, a single channel system with a constant service time causes a reduction of 50 percent in the average number waiting in line.

Accepted Answer

A) True 
 B)False

Question 20

In a single-channel system, the utilization is equal to the arrival rate divided by the service rate.

Accepted Answer

A) True 
 B)False

Exam 18: Management of Waiting Lines

The finite-source queuing model is appropriate when the potential calling population is relatively large.

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

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

In an infinite source model, the average time in line is equal to the average number in line divided by the arrival rate.

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

A restaurant that implements a limited menu and a "no substitutions" policy during peak dining hours is practicing _____________ with respect to waiting line management.

A ________ is one way of reducing perceived waiting time.

The most commonly used queuing models assume that the arrival rate can be described by a Poisson distribution.

Which one of the following measures of system performance is a key measure with respect to customer satisfaction?

What is the average machine downtime with two operators?

A multiple channel system assumes that each server will have its own waiting line and line changing is not permitted.

A system has one service facility that can service 10 customers per hour.The customers arrive at a variable rate, which averages 6 per hour.Since there is excess capacity, no waiting lines will form.

The total cost curve:

A multiple channel queuing system with a Poisson arrival rate and exponential service time has an average arrival rate of 4 customers per hour and an average service time of 18 minutes per customer.The minimum number of servers required to avoid an overloaded system is:

When the waiting cost incurred by customers likely varies, an appropriate queuing model is:

Compared to a single channel system with exponential service time, the same system with a constant service time will have an average of one-half the number of customers waiting in the system.

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

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

Compared to a single channel a system with exponential service time, a single channel system with a constant service time causes a reduction of 50 percent in the average number waiting in line.

In a single-channel system, the utilization is equal to the arrival rate divided by the service rate.

Introduction to Operations Management

Competitiveness, Strategy, and Productivity

Forecasting

Product and Service Design

Strategic Capacity Planning for Products and Services

Process Selection and Facility Layout

Work Design and Measurement

Location Planning and Analysis

Management of Quality

Quality Control

Aggregate Planning and Master Scheduling

MRP and ERP

Inventory Management

Jit and Lean Operations

Supply Chain Management

Scheduling

Project Management

Linear Programming

Extension 4: Reliability

Extension 5: Decision Theory

Extension 7: Learning Curves

Extension 8: The Transportation Model

Extension 10: Acceptance Sampling

Extension 14: Maintenance

Filters