Question 1

A system has one service facility that can service 10 customers per hour The customers arrive at an average rate of 6 per hour In this case,no waiting line will form

Accepted Answer

A) True 
 B)False  False

Question 2

A small popular restaurant at an interstate truck stop provides priority service to truckers.The restaurant has ten tables where customers may be seated.The service time averages 40 minutes once a party is seated.The customer arrival rate is 12 parties per hour,with the parties being equally divided between truckers and non-truckers.
-On average,how many parties of non-truckers are waiting to be seated?

Accepted Answer

A) 0 27 
B) 0 52 
C) 0 88 
D) 1 36 
E) 1 75 
A) 0 27 
B) 0 52 
C) 0 88 
D) 1 36 
E) 1 75 D

Question 3

Managers who oversee queueing systems are usually concerned with how many customers are waiting and how long they will have to wait

Accepted Answer

A) True 
 B)False  True

Question 4

The exponential distribution will always provide a reasonably close approximation of the true service-time distribution

Accepted Answer

A) True 
 B)False

Question 5

The term queue discipline refers to:

Accepted Answer

A) the willingness of customers to wait in line for service 
B) having multiple waiting lines without customers switching from line to line 
C) the order in which customers are processed 
D) the reason waiting occurs in underutilized systems 
E) None of the above 
A) the willingness of customers to wait in line for service 
B) having multiple waiting lines without customers switching from line to line 
C) the order in which customers are processed 
D) the reason waiting occurs in underutilized systems 
E) None of the above

Question 6

Customers arrive at a suburban ticket outlet at the rate of 14 per hour on Monday mornings (exponential interarrival times). Selling the tickets and providing general information takes an average of 3 minutes per customer, and varies exponentially. There is 1 ticket agent on duty on Mondays.
-What is the average number of customers waiting in line?

Accepted Answer

A) 1 633 
B) 2 333 
C) 2 5 
D) 3 966 
E) 4 
A) 1 633 
B) 2 333 
C) 2 5 
D) 3 966 
E) 4

Question 7

Which of the following is not an assumption of a multiple priority queueing model?

Accepted Answer

A) Exponential interarrival times 
B) Exponential service times 
C) Customers are processed in the order of arrival 
D) Customers wait in a single line 
E) All of the above are assumptions 
A) Exponential interarrival times 
B) Exponential service times 
C) Customers are processed in the order of arrival 
D) Customers wait in a single line 
E) All of the above are assumptions

Question 8

Customers filter into a record shop at an average of 1 per minute (exponential interarrivals) where the service rate is 15 per hour (exponential service times).
-What is the average number of customers in the system with 8 servers?

Accepted Answer

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

Question 9

In a single-server system,the utilization factor is equal to the mean arrival rate divided by the mean service rate

Accepted Answer

A) True 
 B)False

Question 10

The only distribution of interarrival times that fits having random arrivals is the exponential distribution

Accepted Answer

A) True 
 B)False

Question 11

The most commonly used queueing models assume a service rate that is exponential

Accepted Answer

A) True 
 B)False

Question 12

Customers filter into a record shop at an average of 1 per minute (exponential interarrivals) where the service rate is 15 per hour (exponential service times).
-What is the system utilization factor if 5 servers are used?

Accepted Answer

A) 0 6 
B) 0 7 
C) 0 8 
D) 0 9 
E) 1 
A) 0 6 
B) 0 7 
C) 0 8 
D) 0 9 
E) 1

Question 13

A single-server queueing 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 the utilization factor 
B) decrease the utilization factor 
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 the utilization factor 
B) decrease the utilization factor 
C) increase the average waiting time 
D) decrease the average waiting time 
E) not have any effect since the service time is unchanged

Question 14

Customers arrive at a video rental desk at the rate of one per minute (exponential interarrival times). Each server can handle 0.4 customers per minute (exponential service times).
-If there are 4 servers,what is the average time it takes in minutes to rent a videotape?

Accepted Answer

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

Question 15

The goal of queuing analysis is to minimize customer waiting lines

Accepted Answer

A) True 
 B)False

Question 16

In a preemptive priority system,the lowest-priority customer being served is ejected back into the queue whenever a higher-priority customer enters the queueing system

Accepted Answer

A) True 
 B)False

Question 17

A multiple-server system has customers arriving at an average rate of five per hour and an average service time of forty minutes The minimum number of servers for this system to have a utilization factor under 1 is:

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) None of the above 
A) 2 
B) 3 
C) 4 
D) 5 
E) None of the above

Question 18

On average,how much longer in minutes do parties of non-truckers spend in the system,compared to parties of truckers?

Accepted Answer

A) 4 
B) 7 
C) 11 
D) 15 
E) It is impossible to determine without more information 
A) 4 
B) 7 
C) 11 
D) 15 
E) It is impossible to determine without more information

Question 19

The goal of queueing analysis is to minimize:

Accepted Answer

A) the sum of customer waiting costs and service costs 
B) the sum of customer waiting time and service time 
C) service costs 
D) customer waiting time 
E) None of the above 
A) the sum of customer waiting costs and service costs 
B) the sum of customer waiting time and service time 
C) service costs 
D) customer waiting time 
E) None of the above

Question 20

If clerk cost is $30 per hour and customer waiting time represents a cost of $20 per hour,how many clerks can be justified on a cost basis?

Accepted Answer

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

A system has one service facility that can service 10 customers per hour The customers arrive at an average rate of 6 per hour In this case,no waiting line will form

Managers who oversee queueing systems are usually concerned with how many customers are waiting and how long they will have to wait

The exponential distribution will always provide a reasonably close approximation of the true service-time distribution

The term queue discipline refers to:

Which of the following is not an assumption of a multiple priority queueing model?

Customers filter into a record shop at an average of 1 per minute (exponential interarrivals) where the service rate is 15 per hour (exponential service times). -What is the average number of customers in the system with 8 servers?

In a single-server system,the utilization factor is equal to the mean arrival rate divided by the mean service rate

The only distribution of interarrival times that fits having random arrivals is the exponential distribution

The most commonly used queueing models assume a service rate that is exponential

Customers filter into a record shop at an average of 1 per minute (exponential interarrivals) where the service rate is 15 per hour (exponential service times). -What is the system utilization factor if 5 servers are used?

A single-server queueing 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:

Customers arrive at a video rental desk at the rate of one per minute (exponential interarrival times). Each server can handle 0.4 customers per minute (exponential service times). -If there are 4 servers,what is the average time it takes in minutes to rent a videotape?

The goal of queuing analysis is to minimize customer waiting lines

In a preemptive priority system,the lowest-priority customer being served is ejected back into the queue whenever a higher-priority customer enters the queueing system

A multiple-server system has customers arriving at an average rate of five per hour and an average service time of forty minutes The minimum number of servers for this system to have a utilization factor under 1 is:

On average,how much longer in minutes do parties of non-truckers spend in the system,compared to parties of truckers?

The goal of queueing analysis is to minimize:

If clerk cost is $30 per hour and customer waiting time represents a cost of $20 per hour,how many clerks can be justified on a cost basis?

Introduction

Linear programming: Basic Concepts

Linear programming: Formulation and applications

Theart of modeling with spread sheets

What-If Analysis for linear programming

Network optimization problems

Using binary integer programming to deal withy es-Or-No decisions

Non linear programming

Decision Analysis

Forecasting

Computer simulation: Basic Concepts

Computer simulation with risks olver platform

Solution concepts for linear programming

Transportation and assignment problems

Pert CPM models for project management

Goal programming

Inventory management with known demand

Inventory management with uncertain demand

Computer simulation with crystal ball

Filters

Exam 11: Queuing models

A system has one service facility that can service 10 customers per hour The customers arrive at an average rate of 6 per hour In this case,no waiting line will form

Managers who oversee queueing systems are usually concerned with how many customers are waiting and how long they will have to wait

The exponential distribution will always provide a reasonably close approximation of the true service-time distribution

The term queue discipline refers to:

Which of the following is not an assumption of a multiple priority queueing model?

Customers filter into a record shop at an average of 1 per minute (exponential interarrivals) where the service rate is 15 per hour (exponential service times). -What is the average number of customers in the system with 8 servers?

In a single-server system,the utilization factor is equal to the mean arrival rate divided by the mean service rate

The only distribution of interarrival times that fits having random arrivals is the exponential distribution

The most commonly used queueing models assume a service rate that is exponential

Customers filter into a record shop at an average of 1 per minute (exponential interarrivals) where the service rate is 15 per hour (exponential service times). -What is the system utilization factor if 5 servers are used?

A single-server queueing 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:

Customers arrive at a video rental desk at the rate of one per minute (exponential interarrival times). Each server can handle 0.4 customers per minute (exponential service times). -If there are 4 servers,what is the average time it takes in minutes to rent a videotape?

The goal of queuing analysis is to minimize customer waiting lines

In a preemptive priority system,the lowest-priority customer being served is ejected back into the queue whenever a higher-priority customer enters the queueing system

A multiple-server system has customers arriving at an average rate of five per hour and an average service time of forty minutes The minimum number of servers for this system to have a utilization factor under 1 is:

On average,how much longer in minutes do parties of non-truckers spend in the system,compared to parties of truckers?

The goal of queueing analysis is to minimize:

If clerk cost is $30 per hour and customer waiting time represents a cost of $20 per hour,how many clerks can be justified on a cost basis?

Introduction

Linear programming: Basic Concepts

Linear programming: Formulation and applications

Theart of modeling with spread sheets

What-If Analysis for linear programming

Network optimization problems

Using binary integer programming to deal withy es-Or-No decisions

Non linear programming

Decision Analysis

Forecasting

Computer simulation: Basic Concepts

Computer simulation with risks olver platform

Solution concepts for linear programming

Transportation and assignment problems

Pert CPM models for project management

Goal programming

Inventory management with known demand

Inventory management with uncertain demand

Computer simulation with crystal ball

Filters