Question 1

The following questions refer to this data for a multiple server,priority service queuing model:
   What is average time in the system for a low priority item?

Accepted Answer

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

Question 2

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 .40,arrival rate is 16 per hour and the service rate is 18 per hour.

Accepted Answer

A) 0.1156 
B) 0.1987 
C) 0.2115 
D) 0.2497 
E) 0.3655 
A) 0.1156 
B) 0.1987 
C) 0.2115 
D) 0.2497 
E) 0.3655

Question 3

A queuing system has four work stations with three workers to staff each station.To analyze this system,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 4

Studies have shown a difference between the actual time customers spend waiting and their perceived time.

Accepted Answer

A) True 
 B)False

Question 5

Queuing models discussed in the text pertain only to stable conditions.Stable conditions exist only when customers arrive at a constant rate; that is,without any variability.

Accepted Answer

A) True 
 B)False

Question 6

Infinite source queuing models basically apply only to underloaded systems in which waiting lines can form.

Accepted Answer

A) True 
 B)False

Question 7

The finite-source queuing model is appropriate when the potential calling population is relatively small.

Accepted Answer

A) True 
 B)False

Question 8

When the cost incurred by all customers is not the same,an appropriate queuing model is:

Accepted Answer

A) single server,single phase. 
B) single server,two phases. 
C) multiple server,single priority. 
D) multiple server,multiple phase. 
E) multiple server,with priority. 
A) single server,single phase. 
B) single server,two phases. 
C) multiple server,single priority. 
D) multiple server,multiple phase. 
E) multiple server,with priority.

Question 9

The cost of having customers wait has to be balanced with the cost of providing service capacity.

Accepted Answer

A) True 
 B)False

Question 10

If wait times are too long managers can relegate some customers to lower priority classes.

Accepted Answer

A) True 
 B)False

Question 11

Why is there waiting in a queue even if the service capacity exceeds the average demand on the system?

Accepted Answer

A) Poor scheduling 
B) Slow service 
C) Low utilization 
D) Variability in arrival and service rates 
E) Multiple phase processing 
A) Poor scheduling 
B) Slow service 
C) Low utilization 
D) Variability in arrival and service rates 
E) Multiple phase processing

Question 12

A bank of ten machines requires regular periodic service.Machine running time and service time are both exponential.Machines run for an average of 44 minutes between service requirements,and service time averages 6 minutes per machine. What is the average number of machines down with one operator?

Accepted Answer

A) 1.49 
B) 3.35 
C) 4.40 
D) 6.65 
E) 8.51 
A) 1.49 
B) 3.35 
C) 4.40 
D) 6.65 
E) 8.51

Question 13

A single server queuing system has an average service time of eight minutes and an average time between arrivals of 10 minutes.The average 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 14

For a server that already has a high utilization ratio,decreasing service capacity will only have a negligible effect on customer waiting time.

Accepted Answer

A) True 
 B)False

Question 15

A bank is designing a new branch office and needs to determine how much driveway space to allow for cars waiting for drive up teller service.The drive up service will have three tellers and a single waiting line.At another branch of the bank in a similar setting,the average service time for drive up tellers is 4 minutes per customer and average arrival rate is 36 customers per hour.It is expected that the new bank will have similar characteristics. For how many tellers should the system be designed if the managers want the average time a customer spends in the system to be no more than 5 minutes?

Accepted Answer

A) at least 3 
B) at least 4 
C) at least 5 
D) at least 6 
E) It is impossible to say without more information. 
A) at least 3 
B) at least 4 
C) at least 5 
D) at least 6 
E) It is impossible to say without more information.

Question 16

All of the following are characteristics of the waiting line system that affect the choice of the queuing model EXCEPT:

Accepted Answer

A) potential number of customers. 
B) order of service (queue discipline). 
C) cost of service. 
D) arrival and service patterns. 
E) number of servers. 
A) potential number of customers. 
B) order of service (queue discipline). 
C) cost of service. 
D) arrival and service patterns. 
E) number of servers.

Question 17

The multiple server queuing table cannot be applied to single server systems.

Accepted Answer

A) True 
 B)False

Question 18

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) The arrival rate decreases. 
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) The arrival rate decreases.

Question 19

The following questions refer to this data for a multiple server,priority service queuing model:
   What is the average number of all items waiting in line for service?

Accepted Answer

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

Exam 25: Waiting-Line Analysis

The following questions refer to this data for a multiple server,priority service queuing model: What is average time in the system for a low priority item?

A queuing system has four work stations with three workers to staff each station.To analyze this system,the number of "servers" is:

Studies have shown a difference between the actual time customers spend waiting and their perceived time.

Queuing models discussed in the text pertain only to stable conditions.Stable conditions exist only when customers arrive at a constant rate; that is,without any variability.

Infinite source queuing models basically apply only to underloaded systems in which waiting lines can form.

The finite-source queuing model is appropriate when the potential calling population is relatively small.

When the cost incurred by all customers is not the same,an appropriate queuing model is:

The cost of having customers wait has to be balanced with the cost of providing service capacity.

If wait times are too long managers can relegate some customers to lower priority classes.

Why is there waiting in a queue even if the service capacity exceeds the average demand on the system?

A bank of ten machines requires regular periodic service.Machine running time and service time are both exponential.Machines run for an average of 44 minutes between service requirements,and service time averages 6 minutes per machine. What is the average number of machines down with one operator?

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

For a server that already has a high utilization ratio,decreasing service capacity will only have a negligible effect on customer waiting time.

All of the following are characteristics of the waiting line system that affect the choice of the queuing model EXCEPT:

The multiple server queuing table cannot be applied to single server systems.

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

The following questions refer to this data for a multiple server,priority service queuing model: What is the average number of all items waiting in line for service?

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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