Question 1

First-come, first-served is an unbiased priority rule.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is least likely to be considered an infinite customer population?

Accepted Answer

A) customers in an amusement park 
B) a class of 500 students who might visit their professor during office hours 
C) a class of 10 students who might visit their professor during office hours 
D) customers in a grocery store 
E) cars taking Exit 76 off of a freeway during rush hour 
A) customers in an amusement park 
B) a class of 500 students who might visit their professor during office hours 
C) a class of 10 students who might visit their professor during office hours 
D) customers in a grocery store 
E) cars taking Exit 76 off of a freeway during rush hour

Question 3

List possible priority rules for waiting line systems.

Accepted Answer

first-come, first served; best

Question 4

If only two cars can physically fit between the ordering and pay window of a fast-food drive-through, the waiting line system has a ____ _____ waiting line.

Accepted Answer

A) constrained server 
B) finite size 
C) infinite size 
D) multi-phase 
E) single service 
A) constrained server 
B) finite size 
C) infinite size 
D) multi-phase 
E) single service

Question 5

Consider a single-line, single-server waiting line system. Suppose that customers arrive according to a Poisson distribution at an average rate of 60 per hour, and the average (exponentially distributed)service time is 45 seconds per customer. What is the average number of customers waiting in line?

Accepted Answer

The answer of Consider a single-line, single-server waiting line system....

Question 6

In a single-line, multi-server, single phase model, customers form a ________ line.

Accepted Answer

The answer of In a single-line, multi-server, single phase model,...

Question 7

Reneging occurs when a customer enters a waiting line but decides to exit before being served.

Accepted Answer

A) True 
 B)False

Question 8

Consider a single-line, single-server waiting line system. The arrival rate λ is 40 people per hour, and the service rate µ is 80 people per hour. What is the average number of customers in line?

Accepted Answer

A)  0.5 
B)  0.025 
C)  1.0 
D)  0.0125 
E) 20.0 
A)  0.5 
B)  0.025 
C)  1.0 
D)  0.0125 
E) 20.0

Question 9

For a single-server, single-line, single-phase waiting line system, where F1F1F1S1F1F1F10 represents the mean arrival rate of customers and F1F1F1S1F1F1F10 represents the mean service rate, what is the formula for the average number of customers waiting in line?

Accepted Answer

A) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10 
B) F1F1F1S1F1F1F10 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
C)  pL Ref pg 66 in PDF 
D) 1 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
E) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
A) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10 
B) F1F1F1S1F1F1F10 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
C)  pL Ref pg 66 in PDF 
D) 1 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
E) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10)

Question 10

For a single-server, single-line, single-phase waiting line system, where F1F1F1S1F1F1F10 represents the mean arrival rate of customers and F1F1F1S1F1F1F10 represents the mean service rate, what is the formula for the average number of customers in the system?

Accepted Answer

A) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10 
B) F1F1F1S1F1F1F10 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
C) F1F1F1S1F1F1F102 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
D) 1 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
E) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
A) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10 
B) F1F1F1S1F1F1F10 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
C) F1F1F1S1F1F1F102 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
D) 1 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
E) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10)

Question 11

For a single-server, single-line, single-phase waiting line system, where F1F1F1S1F1F1F10 represents the mean arrival rate of customers and F1F1F1S1F1F1F10 represents the mean service rate, what is the formula for the average utilization of the system?

Accepted Answer

A) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10 
B) F1F1F1S1F1F1F10 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
C) F1F1F1S1F1F1F102 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
D) 1 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
E) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
A) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10 
B) F1F1F1S1F1F1F10 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
C) F1F1F1S1F1F1F102 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
D) 1 / (F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10) 
E) F1F1F1S1F1F1F10 / F1F1F1S1F1F1F10(F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10)

Question 12

Which of the following is not considered to be an element of a waiting line system?

Accepted Answer

A) the customer population source 
B) the service system 
C) the arrival and service patterns 
D) the average amount of time a customer spends in the system 
E) the priorities used for controlling the line 
A) the customer population source 
B) the service system 
C) the arrival and service patterns 
D) the average amount of time a customer spends in the system 
E) the priorities used for controlling the line

Question 13

A single-line service system is best when specialized servers are used.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is not considered to be a valid performance measure of a waiting line system?

Accepted Answer

A) the priority used for controlling the line 
B) the average number of customers waiting in line 
C) the average number of customers in the system 
D) the average amount of time customers spend waiting 
E) the system utilization rate 
A) the priority used for controlling the line 
B) the average number of customers waiting in line 
C) the average number of customers in the system 
D) the average amount of time customers spend waiting 
E) the system utilization rate

Question 15

The reference desk of a university library receives requests for assistance. Assume that a Poisson probability distribution with a mean rate of 10 requests per hour can be used to describe the arrival pattern and that service times follow the exponential probability distribution, with a mean service rate of 12 requests per hour.
a)What is the probability that there are no requests for assistance in the system?
b)What is the average number of requests that will be waiting for service?
c)What is the average waiting time in minutes before service begins?
d)What is the average time at the reference desk in minutes (waiting time plus service time)?
e)What is the probability that a new arrival has to wait for service?
f)Suppose that another helper could be hired to join the desk, and she would have the same service rate. Assuming that all patrons wait in a single line, what is the new average waiting time in minutes before service begins?
g)Instead of the change in question f, suppose that a "super" librarian can be hired who can handle 16 requests per hour. Now what is the average waiting time in minutes before service begins?

Accepted Answer

(a)16.67%, 
(b)4.17 people,
 (

Question 16

Implementing process improvements or dedication of additional resources is one way to improve:

Accepted Answer

A) priority rule applications 
B) the number of lines required 
C) server efficiency 
D) service facilities 
E) arrival rates 
A) priority rule applications 
B) the number of lines required 
C) server efficiency 
D) service facilities 
E) arrival rates

Question 17

Waiting line priority rules determines _________ customer is served _________.

Accepted Answer

The answer of Waiting line priority rules determines _________ customer...

Question 18

What are two ways to improve server efficiency?

Accepted Answer

process improvements

Question 19

Which of the following is not considered to be an element of a waiting line system?

Accepted Answer

A) the customer population source 
B) the service system 
C) the average number of customers waiting in line 
D) the arrival and service patterns 
E) the priorities used for controlling the line 
A) the customer population source 
B) the service system 
C) the average number of customers waiting in line 
D) the arrival and service patterns 
E) the priorities used for controlling the line

Question 20

There are many variations of the mathematical models for designing waiting lines.

Accepted Answer

A) True 
 B)False

First-come, first-served is an unbiased priority rule.

Which of the following is least likely to be considered an infinite customer population?

List possible priority rules for waiting line systems.

If only two cars can physically fit between the ordering and pay window of a fast-food drive-through, the waiting line system has a _ waiting line.

Consider a single-line, single-server waiting line system. Suppose that customers arrive according to a Poisson distribution at an average rate of 60 per hour, and the average (exponentially distributed)service time is 45 seconds per customer. What is the average number of customers waiting in line?

In a single-line, multi-server, single phase model, customers form a ________ line.

Reneging occurs when a customer enters a waiting line but decides to exit before being served.

Consider a single-line, single-server waiting line system. The arrival rate λ is 40 people per hour, and the service rate µ is 80 people per hour. What is the average number of customers in line?

For a single-server, single-line, single-phase waiting line system, where  represents the mean arrival rate of customers and  represents the mean service rate, what is the formula for the average number of customers waiting in line?

For a single-server, single-line, single-phase waiting line system, where  represents the mean arrival rate of customers and  represents the mean service rate, what is the formula for the average number of customers in the system?

For a single-server, single-line, single-phase waiting line system, where  represents the mean arrival rate of customers and  represents the mean service rate, what is the formula for the average utilization of the system?

Which of the following is not considered to be an element of a waiting line system?

A single-line service system is best when specialized servers are used.

Which of the following is not considered to be a valid performance measure of a waiting line system?

Implementing process improvements or dedication of additional resources is one way to improve:

Waiting line priority rules determines _ customer is served _.

What are two ways to improve server efficiency?

Which of the following is not considered to be an element of a waiting line system?

There are many variations of the mathematical models for designing waiting lines.

Introduction to Operations Management

Operations Strategy and Competitiveness

Product Design and Process Selection

E-Commerce and Supply Chain Management

Total Quality Management

Statistical Quality Control

Just-In-Time and Lean Systems

Forecasting

Capacity Planning and Facility Location

Facility Layout

Work System Design

Independent Demand Inventory Management

Aggregate Planning

Resource Planning

Scheduling

Project Management

Spreadsheet Modeling: an Introduction

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Master Scheduling and Rough-Cut Capacity Planning

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Exam 18: Waiting Line Models

First-come, first-served is an unbiased priority rule.

Which of the following is least likely to be considered an infinite customer population?

List possible priority rules for waiting line systems.

If only two cars can physically fit between the ordering and pay window of a fast-food drive-through, the waiting line system has a ____ _____ waiting line.

In a single-line, multi-server, single phase model, customers form a ________ line.

Reneging occurs when a customer enters a waiting line but decides to exit before being served.

Consider a single-line, single-server waiting line system. The arrival rate λ is 40 people per hour, and the service rate µ is 80 people per hour. What is the average number of customers in line?

For a single-server, single-line, single-phase waiting line system, where  represents the mean arrival rate of customers and  represents the mean service rate, what is the formula for the average number of customers waiting in line?

For a single-server, single-line, single-phase waiting line system, where  represents the mean arrival rate of customers and  represents the mean service rate, what is the formula for the average number of customers in the system?

For a single-server, single-line, single-phase waiting line system, where  represents the mean arrival rate of customers and  represents the mean service rate, what is the formula for the average utilization of the system?

Which of the following is not considered to be an element of a waiting line system?

A single-line service system is best when specialized servers are used.

Which of the following is not considered to be a valid performance measure of a waiting line system?

Implementing process improvements or dedication of additional resources is one way to improve:

Waiting line priority rules determines _________ customer is served _________.

What are two ways to improve server efficiency?

Which of the following is not considered to be an element of a waiting line system?

There are many variations of the mathematical models for designing waiting lines.

Introduction to Operations Management

Operations Strategy and Competitiveness

Product Design and Process Selection

E-Commerce and Supply Chain Management

Total Quality Management

Statistical Quality Control

Just-In-Time and Lean Systems

Forecasting

Capacity Planning and Facility Location

Facility Layout

Work System Design

Independent Demand Inventory Management

Aggregate Planning

Resource Planning

Scheduling

Project Management

Spreadsheet Modeling: an Introduction

Spreadsheet Modeling: an Introduction

Master Scheduling and Rough-Cut Capacity Planning

Filters

If only two cars can physically fit between the ordering and pay window of a fast-food drive-through, the waiting line system has a _ waiting line.

Waiting line priority rules determines _ customer is served _.