Question 1

In a nonpreemptive priority system,customers are served in the order in which they arrive in the queue

Accepted Answer

A) True 
 B)False

Question 2

Queueing models conventionally assume that the queue can hold an unlimited number of customers

Accepted Answer

A) True 
 B)False

Question 3

Most queueing models assume that the form of the probability distribution of interarrival times is an exponential distribution

Accepted Answer

A) True 
 B)False

Question 4

Priority :Average Arrival Rate (exponential interarrival times)
High : 3 per hour
Low : 5 per hour
Number of servers: 5
Service rate: 2 per hour (exponential service times)
-What is the average time in the system (in minutes)for a low priority item?

Accepted Answer

A) 2 
B) 5 
C) 24 
D) 35 
E) 54 
A) 2 
B) 5 
C) 24 
D) 35 
E) 54

Question 5

A multiple priority queueing model assumes that:

Accepted Answer

A) arrival rates are exponentially distributed 
B) service rate is exponentially distributed 
C) items are serviced in the order of arrival 
D) items are serviced in order of priority class 
E) service activities are preemptive 
A) arrival rates are exponentially distributed 
B) service rate is exponentially distributed 
C) items are serviced in the order of arrival 
D) items are serviced in order of priority class 
E) service activities are preemptive

Question 6

If a manager increases the system utilization standard (assuming no change in the customer arrival rate)what happens to the customer waiting time?

Accepted Answer

A) It increases exponentially 
B) It increases proportionally 
C) It decreases proportionally 
D) It decreases exponentially 
E) No change 
A) It increases exponentially 
B) It increases proportionally 
C) It decreases proportionally 
D) It decreases exponentially 
E) No change

Question 7

How many minutes does the average customer spend in the system?

Accepted Answer

A) 7 
B) 8 
C) 9 
D) 10 
E) 11 
A) 7 
B) 8 
C) 9 
D) 10 
E) 11

Question 8

Priority :Average Arrival Rate (exponential interarrival times)
High : 3 per hour
Low : 5 per hour
Number of servers: 5
Service rate: 2 per hour (exponential service times)
-What is the average time in line (in minutes)for a low priority item?

Accepted Answer

A) 2 
B) 5 
C) 24 
D) 35 
E) 54 
A) 2 
B) 5 
C) 24 
D) 35 
E) 54

Question 9

A queueing system has four crew with three members each The number of "servers" is:

Accepted Answer

A) 3 
B) 4 
C) 7 
D) 12 
E) 1 
A) 3 
B) 4 
C) 7 
D) 12 
E) 1

Question 10

Priority :Average Arrival Rate (exponential interarrival times)
High : 3 per hour
Low : 5 per hour
Number of servers: 5
Service rate: 2 per hour (exponential service times)
-What is the overall arrival rate per hour?

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 8 
E) 15 
A) 3 
B) 4 
C) 5 
D) 8 
E) 15

Question 11

Queueing models enable finding an appropriate balance between the cost of service and the amount of waiting

Accepted Answer

A) True 
 B)False

Question 12

The standard deviation for the degenerative distribution equals zero

Accepted Answer

A) True 
 B)False

Question 13

Queue discipline refers to the willingness of customers to wait in line for service

Accepted Answer

A) True 
 B)False

Question 14

A multiple-server queueing system with an exponential arrival rate and service time has a mean arrival rate of 4 customers per hour and a mean service time of 18 minutes per customer The minimum number of servers required to keep the utilization factor under 1 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

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.
-What is the approximate average time in minutes that non-truckers wait to be seated?

Accepted Answer

A) 2 7 
B) 4 5 
C) 8 4 
D) 13 6 
E) 15 8 
A) 2 7 
B) 4 5 
C) 8 4 
D) 13 6 
E) 15 8

Question 16

The assumption of constant service times cannot be used with human servers because of the inevitable variability

Accepted Answer

A) True 
 B)False

Question 17

What is the approximate average time in minutes that truckers wait to be seated?

Accepted Answer

A) 2 7 
B) 4 5 
C) 8 4 
D) 13 6 
E) 15 8 
A) 2 7 
B) 4 5 
C) 8 4 
D) 13 6 
E) 15 8

Question 18

The reason for using priorities is to decrease the waiting times for high-priority customers

Accepted Answer

A) True 
 B)False

Question 19

A queueing system is said to be in a "steady state" when customers arrive at a constant rate,that is,without any variability

Accepted Answer

A) True 
 B)False

Question 20

When designing a single-server queueing system,giving a relatively high utilization factor to the server ensures that the system is working efficiently

Accepted Answer

A) True 
 B)False

In a nonpreemptive priority system,customers are served in the order in which they arrive in the queue

Queueing models conventionally assume that the queue can hold an unlimited number of customers

Most queueing models assume that the form of the probability distribution of interarrival times is an exponential distribution

Priority :Average Arrival Rate (exponential interarrival times) High : 3 per hour Low : 5 per hour Number of servers: 5 Service rate: 2 per hour (exponential service times) -What is the average time in the system (in minutes)for a low priority item?

A multiple priority queueing model assumes that:

If a manager increases the system utilization standard (assuming no change in the customer arrival rate)what happens to the customer waiting time?

How many minutes does the average customer spend in the system?

Priority :Average Arrival Rate (exponential interarrival times) High : 3 per hour Low : 5 per hour Number of servers: 5 Service rate: 2 per hour (exponential service times) -What is the average time in line (in minutes)for a low priority item?

A queueing system has four crew with three members each The number of "servers" is:

Priority :Average Arrival Rate (exponential interarrival times) High : 3 per hour Low : 5 per hour Number of servers: 5 Service rate: 2 per hour (exponential service times) -What is the overall arrival rate per hour?

Queueing models enable finding an appropriate balance between the cost of service and the amount of waiting

The standard deviation for the degenerative distribution equals zero

Queue discipline refers to the willingness of customers to wait in line for service

A multiple-server queueing system with an exponential arrival rate and service time has a mean arrival rate of 4 customers per hour and a mean service time of 18 minutes per customer The minimum number of servers required to keep the utilization factor under 1 is:

The assumption of constant service times cannot be used with human servers because of the inevitable variability

What is the approximate average time in minutes that truckers wait to be seated?

The reason for using priorities is to decrease the waiting times for high-priority customers

A queueing system is said to be in a "steady state" when customers arrive at a constant rate,that is,without any variability

When designing a single-server queueing system,giving a relatively high utilization factor to the server ensures that the system is working efficiently

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

In a nonpreemptive priority system,customers are served in the order in which they arrive in the queue

Queueing models conventionally assume that the queue can hold an unlimited number of customers

Most queueing models assume that the form of the probability distribution of interarrival times is an exponential distribution

Priority :Average Arrival Rate (exponential interarrival times) High : 3 per hour Low : 5 per hour Number of servers: 5 Service rate: 2 per hour (exponential service times) -What is the average time in the system (in minutes)for a low priority item?

A multiple priority queueing model assumes that:

If a manager increases the system utilization standard (assuming no change in the customer arrival rate)what happens to the customer waiting time?

How many minutes does the average customer spend in the system?

Priority :Average Arrival Rate (exponential interarrival times) High : 3 per hour Low : 5 per hour Number of servers: 5 Service rate: 2 per hour (exponential service times) -What is the average time in line (in minutes)for a low priority item?

A queueing system has four crew with three members each The number of "servers" is:

Priority :Average Arrival Rate (exponential interarrival times) High : 3 per hour Low : 5 per hour Number of servers: 5 Service rate: 2 per hour (exponential service times) -What is the overall arrival rate per hour?

Queueing models enable finding an appropriate balance between the cost of service and the amount of waiting

The standard deviation for the degenerative distribution equals zero

Queue discipline refers to the willingness of customers to wait in line for service

A multiple-server queueing system with an exponential arrival rate and service time has a mean arrival rate of 4 customers per hour and a mean service time of 18 minutes per customer The minimum number of servers required to keep the utilization factor under 1 is:

The assumption of constant service times cannot be used with human servers because of the inevitable variability

What is the approximate average time in minutes that truckers wait to be seated?

The reason for using priorities is to decrease the waiting times for high-priority customers

A queueing system is said to be in a "steady state" when customers arrive at a constant rate,that is,without any variability

When designing a single-server queueing system,giving a relatively high utilization factor to the server ensures that the system is working efficiently

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