Question 1

Waiting lines occur even in underloaded systems because of variability in service rates and/or arrival rates.

Accepted Answer

A) True 
 B)False

Question 2

The following questions refer to this data for a multiple server,priority service queuing model:
   What is the overall average arrival rate?

Accepted Answer

The answer of The following questions refer to this data...

Question 3

The most commonly used queuing models assume a service rate that follows an exponential distribution.

Accepted Answer

A) True 
 B)False

Question 4

In waiting lines,reneging occurs when a customer does not join the line because it is too long.

Accepted Answer

A) True 
 B)False

Question 5

The following questions refer to this data for a multiple server,priority service queuing model:
 11eab92b_c474_9b9a_99e6_fdcbe8a56749

Accepted Answer

What is se

Question 6

A multiple server queuing system has a Poisson arrival rate of 16 per hour and exponential service time averaging 8 per hour.Server cost is $25 per hour and the cost of waiting is $40 per hour.Based on total cost,how many servers should be staffed?

Accepted Answer

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

Question 7

A single bay car wash with a Poisson arrival rate and an exponential service time has cars arriving an average of 10 minutes apart,and an average service time of four minutes.The server utilization is:

Accepted Answer

A) 24 
B) 40 
C) 67 
D) 2.50 
E) 60 
A) 24 
B) 40 
C) 67 
D) 2.50 
E) 60

Question 8

A single server 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 average 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 9

In waiting-line analysis,queue discipline refers to the willingness of customers to wait in line for service.

Accepted Answer

A) True 
 B)False

Question 10

A multiple server system assumes that each server will have its own waiting line.

Accepted Answer

A) True 
 B)False

Question 11

The following questions refer to this data for a multiple server,priority service queuing model:
 11eab92b_c474_c2ad_99e6_4d891bf991d1

Accepted Answer

What is average time

Question 12

Which of these would increase server utilization?

Accepted Answer

A) An increase in the average service rate. 
B) An increase in average arrival rate. 
C) An increase in the number of servers. 
D) A decrease in service time. 
E) An increase in server cost. 
A) An increase in the average service rate. 
B) An increase in average arrival rate. 
C) An increase in the number of servers. 
D) A decrease in service time. 
E) An increase in server cost.

Question 13

Total queuing system costs are always minimized at the point where the costs of customers waiting are equal to the service capacity costs.

Accepted Answer

A) True 
 B)False

Question 14

If a manager increases server utilization (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) There is no change in the time. 
A) It increases exponentially. 
B) It increases proportionally. 
C) It decreases proportionally. 
D) It decreases exponentially. 
E) There is no change in the time.

Question 15

The following questions refer to this data for a multiple server,priority service queuing model:

Accepted Answer

@#IMG-DLM&_TB6896_00 What is a

Question 16

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 average arrival rate. 
D) the potential number of customers. 
E) the processing rate. 
A) the number of servers. 
B) the average waiting time. 
C) the average arrival rate. 
D) the potential number of customers. 
E) the processing rate.

Question 17

A manager assembled the following information about an infinite source waiting line system: 5 servers,an arrival rate of 6 per hour,and a service time of 20 minutes.The manager has determined that the average number of customers waiting for service is .04.Determine each of the following:
(i)the server utilization
(ii)the average waiting time in line in minutes
(iii)the average time in the system
(iv)the average number in the system

Accepted Answer

l = 6/hr.@#LAT-DLM& = 3/hr.M = 5 L<sub>q

Question 18

A system has one service facility that on an average can service 10 customers per hour.The customers arrive at a variable rate,which averages 6 per hour.In this circumstance,no waiting lines will form.

Accepted Answer

A) True 
 B)False

Question 19

A single phase queuing system is one which has a single:

Accepted Answer

A) type of customer (homogeneous). 
B) server. 
C) customer being served. 
D) operational step. 
E) time all customers wait. 
A) type of customer (homogeneous). 
B) server. 
C) customer being served. 
D) operational step. 
E) time all customers wait.

Question 20

In a single server,exponential service durations,and finite number in system model there are 4 customers in the system three in line and one being served.What is the probability no new customer will join the line? The probability of zero customers in the system is .375,arrival rate is 18 per hour and the service rate is 24 per hour.

Accepted Answer

A) 0.093 
B) 0.1187 
C) 0.256 
D) 0.289 
E) 0.311 
A) 0.093 
B) 0.1187 
C) 0.256 
D) 0.289 
E) 0.311

Exam 25: Waiting-Line Analysis

Waiting lines occur even in underloaded systems because of variability in service rates and/or arrival rates.

The following questions refer to this data for a multiple server,priority service queuing model: What is the overall average arrival rate?

The most commonly used queuing models assume a service rate that follows an exponential distribution.

In waiting lines,reneging occurs when a customer does not join the line because it is too long.

The following questions refer to this data for a multiple server,priority service queuing model: 11eab92b_c474_9b9a_99e6_fdcbe8a56749

A multiple server queuing system has a Poisson arrival rate of 16 per hour and exponential service time averaging 8 per hour.Server cost is $25 per hour and the cost of waiting is $40 per hour.Based on total cost,how many servers should be staffed?

A single bay car wash with a Poisson arrival rate and an exponential service time has cars arriving an average of 10 minutes apart,and an average service time of four minutes.The server utilization is:

A single server 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 average arrival rate will remain the same.The effect will be to:

In waiting-line analysis,queue discipline refers to the willingness of customers to wait in line for service.

A multiple server system assumes that each server will have its own waiting line.

The following questions refer to this data for a multiple server,priority service queuing model: 11eab92b_c474_c2ad_99e6_4d891bf991d1

Which of these would increase server utilization?

Total queuing system costs are always minimized at the point where the costs of customers waiting are equal to the service capacity costs.

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

The following questions refer to this data for a multiple server,priority service queuing model:

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

A system has one service facility that on an average can service 10 customers per hour.The customers arrive at a variable rate,which averages 6 per hour.In this circumstance,no waiting lines will form.

A single phase queuing system is one which has a single:

Introduction to Operations Management

Competitiveness, strategic Planning, and Productivity

Demand Forecasting

Product Design

Reliability

Strategic Capacity Planning

Decision Analysis

Process Design and Facility Layout

Linear Programming

Workjob Design

Learning Curves

Location Planning and Analysis

the Transportation Model

Management of Quality

Statistical Quality Control

Acceptance Sampling

Supply Chain Management

Inventory Management

Aggregate Operations Planning and Master Scheduling

Material Requirements Planning and Enterprise Resource Planning

Just-In-Time and Lean Production

Maintenance

Job and Staff Scheduling

Project Management

Simulation

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