Question 1

Why is there waiting in an infinite source queuing system?

Accepted Answer

A) poor scheduling of servers 
B) slow service 
C) low utilization 
D) variability in arrival and service rates 
E) multiple phase processing 
A) poor scheduling of servers 
B) slow service 
C) low utilization 
D) variability in arrival and service rates 
E) multiple phase processing

Question 2

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

Accepted Answer

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

Question 3

In an infinite source model, the average number being served is equal to the ratio of the arrival rate to the service rate.

Accepted Answer

A) True 
 B)False

Question 4

If operators cost $15 per hour in wages and fringe benefits and machine downtime costs $75 per hour in lost production, what is the optimal number of operators for this bank of machines?

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

What is the overall average arrival rate?

Accepted Answer

The answer of What is the overall average arrival rate?...

Question 7

A single channel queuing system has an average service time of eight minutes and an average time between arrivals of 10 minutes.The arrival rate is:

Accepted Answer

A) 6 per hour 
B) 7.5 per hour 
C) 8 per hour 
D) 10 per hour 
E) 12.5 per hour 
A) 6 per hour 
B) 7.5 per hour 
C) 8 per hour 
D) 10 per hour 
E) 12.5 per hour

Question 8

In a theme park like Disney world, reservation systems are a win-lose situation since only those holding reservations are satisfied.

Accepted Answer

A) True 
 B)False

Question 9

As the ratio of arrival rate to service rate is increased, which of the following is likely?

Accepted Answer

A) Customers move through the system in less time because utilization is increased. 
B) Customers move through the system more slowly because utilization is increased. 
C) Utilization is decreased because of the added strain on the system. 
D) The average number in the system decreases. 
E) There really is no change since arrival rates are offset by service rates. 
A) Customers move through the system in less time because utilization is increased. 
B) Customers move through the system more slowly because utilization is increased. 
C) Utilization is decreased because of the added strain on the system. 
D) The average number in the system decreases. 
E) There really is no change since arrival rates are offset by service rates.

Question 10

A dental office with two professionals (one dentist, one hygienist) who work together as a team would be an example of a multiple channel system.

Accepted Answer

A) True 
 B)False

Question 11

What is the average time that parties without player's cards wait to be seated?

Accepted Answer

A) approx.4 minutes 
B) approx.8 minutes 
C) approx.12 minutes 
D) approx.15 minutes 
E) approx.2 minutes 
A) approx.4 minutes 
B) approx.8 minutes 
C) approx.12 minutes 
D) approx.15 minutes 
E) approx.2 minutes

Question 12

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 system utilization is:

Accepted Answer

A) .24 
B) .40 
C) .67 
D) 2.50 
E) none of these 
A) .24 
B) .40 
C) .67 
D) 2.50 
E) none of these

Question 13

Customers filter into a record shop at an average of 1 per minute (Poisson) where the service rate is 15 per hour (Poisson).
Determine the following:
(A) the average number of customers in the system with 8 servers
(B) the minimum number of servers needed to keep the average time in the system to under 6 minutes

Accepted Answer

A) @#IMG-DLM& B) Average time in the sys

Question 14

The goal of queuing analysis is to balance the cost of providing a level of service capacity with the possible loss of business due to customers leaving the line or refusing to wait.

Accepted Answer

A) True 
 B)False

Question 15

Customers arrive at a suburban ticket outlet at the rate of 14 per hour on Monday mornings.This can be described by a Poisson distribution.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.Determine each of the following:
(A) system utilization
(B) average number in line
(C) average time in line
(D) average time in the system

Accepted Answer

The answer of Customers arrive at a suburban ticket outlet...

Question 16

A queuing system has four crews 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 17

What is average time in the system for a high priority item?

Accepted Answer

The answer of What is average time in the system...

Question 18

The goal of queuing analysis is to minimize:

Accepted Answer

A) the sum of customer waiting costs and capacity costs 
B) the sum of customer waiting time and service time 
C) capacity costs 
D) customer waiting time 
E) idle servers 
A) the sum of customer waiting costs and capacity costs 
B) the sum of customer waiting time and service time 
C) capacity costs 
D) customer waiting time 
E) idle servers

Question 19

For a system that has a low utilization ratio, decreasing service capacity slightly will have only negligible effect on customer waiting time.

Accepted Answer

A) True 
 B)False

Question 20

Queue discipline requires a security presence to maintain order.

Accepted Answer

A) True 
 B)False

Exam 18: Management of Waiting Lines

Why is there waiting in an infinite source queuing system?

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

In an infinite source model, the average number being served is equal to the ratio of the arrival rate to the service rate.

If operators cost $15 per hour in wages and fringe benefits and machine downtime costs $75 per hour in lost production, what is the optimal number of operators for this bank of machines?

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

What is the overall average arrival rate?

A single channel queuing system has an average service time of eight minutes and an average time between arrivals of 10 minutes.The arrival rate is:

In a theme park like Disney world, reservation systems are a win-lose situation since only those holding reservations are satisfied.

As the ratio of arrival rate to service rate is increased, which of the following is likely?

A dental office with two professionals (one dentist, one hygienist) who work together as a team would be an example of a multiple channel system.

What is the average time that parties without player's cards wait to be seated?

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 system utilization is:

The goal of queuing analysis is to balance the cost of providing a level of service capacity with the possible loss of business due to customers leaving the line or refusing to wait.

A queuing system has four crews with three members each.The number of "servers" is:

What is average time in the system for a high priority item?

The goal of queuing analysis is to minimize:

For a system that has a low utilization ratio, decreasing service capacity slightly will have only negligible effect on customer waiting time.

Queue discipline requires a security presence to maintain order.

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