Question 1

Little's flow equations indicate that the relationship of L to Lq is the same as that of W to Wq.

Accepted Answer

A) True 
 B)False

Question 2

Performance measures dealing with the number of units in line and the time spent waiting are called

Accepted Answer

A) queuing facts. 
B) performance queues. 
C) system measures. 
D) operating characteristics. 
A) queuing facts. 
B) performance queues. 
C) system measures. 
D) operating characteristics.

Question 3

When no limit is placed on how many units may seek service,the waiting line model

Accepted Answer

A) can assume that no units are in the system. 
B) is said to have an infinite calling population. 
C) maintains a constant arrival rate. 
D) None of these are correct. 
A) can assume that no units are in the system. 
B) is said to have an infinite calling population. 
C) maintains a constant arrival rate. 
D) None of these are correct.

Question 4

The total cost for a waiting line does NOT specifically depend on the

Accepted Answer

A) cost of waiting. 
B) cost of service. 
C) number of units in the system. 
D) cost of a lost customer. 
A) cost of waiting. 
B) cost of service. 
C) number of units in the system. 
D) cost of a lost customer.

Question 5

For many waiting line situations,the arrivals occur randomly and independently of other arrivals and it has been found that a good description of the arrival pattern is provided by a(n)

Accepted Answer

A) normal probability distribution. 
B) exponential probability distribution. 
C) uniform probability distribution. 
D) Poisson probability distribution. 
A) normal probability distribution. 
B) exponential probability distribution. 
C) uniform probability distribution. 
D) Poisson probability distribution.

Question 6

Models with a finite calling population

Accepted Answer

A) have an arrival rate independent of the number of units in the system. 
B) have a service rate dependent on the number of units in the system. 
C) have no limit placed on how many units may seek service. 
D) All of these are correct. 
A) have an arrival rate independent of the number of units in the system. 
B) have a service rate dependent on the number of units in the system. 
C) have no limit placed on how many units may seek service. 
D) All of these are correct.

Question 7

When blocked customers are cleared,an important decision is how many servers to provide.

Accepted Answer

A) True 
 B)False

Question 8

The eight students in a seminar class must come to the professor's office to turn in a paper and give a five-minute oral summary.Assume there is a service rate of 10 per hour and adequate time is available for all.The arrival rate for each unit is five per hour.What is the probability there is no one in the office or waiting when you come?

Accepted Answer

λ = 5,μ =

Question 9

Quick Clean Rooter cleans out clogged drains.Due to the competitive nature of the drain cleaning business,if a customer calls Quick Clean and finds the line busy,they immediately try another company and Quick Clean loses the business.Quick Clean management estimates that,on average,a customer tries to call Quick Clean every three minutes and the average time to take a service order is 200 seconds.The company wishes to hire enough operators so that at most 4% of its potential customers get the busy signal.
a.How many operators should be hired to meet this objective?
b.Given your answer to part (a),what is the probability that all the operators are idle?

Accepted Answer

The answer of Quick Clean Rooter cleans out clogged drains.Due...

Question 10

In waiting line applications,the exponential probability distribution indicates that approximately 63% of the service times are less than the mean service time.

Accepted Answer

A) True 
 B)False

Question 11

After the startup or transient period,a waiting system is in steady-state operation and considered to be the normal operation of the waiting line.​

Accepted Answer

A) True 
 B)False

Question 12

Operating characteristics formulas for the single-server queue do NOT require

Accepted Answer

A) λ ≥ μ. 
B) Poisson distribution of arrivals. 
C) an exponential distribution of service times. 
D) an FCFS queue discipline. 
A) λ ≥ μ. 
B) Poisson distribution of arrivals. 
C) an exponential distribution of service times. 
D) an FCFS queue discipline.

Question 13

If service time follows an exponential probability distribution,approximately 63% of the service times are less than the mean service time.

Accepted Answer

A) True 
 B)False

Question 14

For a single-server waiting line,the utilization factor is the probability that an arriving unit must wait for service.

Accepted Answer

A) True 
 B)False

Question 15

Before waiting lines can be analyzed economically,the arrivals' cost of waiting must be estimated.

Accepted Answer

A) True 
 B)False

Question 16

Single-booth ticket sales at a theater are an example of which of the following queuing models?

Accepted Answer

A) single-server,Poisson service rate distribution,unlimited queue length 
B) single-server,Poisson service rate distribution,limited queue length 
C) single-server,constant service rate distribution,unlimited queue length 
D) single-server,normal service rate distribution,unlimited queue length 
A) single-server,Poisson service rate distribution,unlimited queue length 
B) single-server,Poisson service rate distribution,limited queue length 
C) single-server,constant service rate distribution,unlimited queue length 
D) single-server,normal service rate distribution,unlimited queue length

Question 17

The arrival rate in queuing formulas is expressed as the

Accepted Answer

A) mean time between arrivals. 
B) minimum number of arrivals per time period. 
C) mean number of arrivals per server. 
D) mean number of arrivals per time period. 
A) mean time between arrivals. 
B) minimum number of arrivals per time period. 
C) mean number of arrivals per server. 
D) mean number of arrivals per time period.

Question 18

The mean number of units that can be served per time period is called

Accepted Answer

A) the service rate and is denoted by λ. 
B) the service rate and is denoted by μ. 
C) the steady state. 
D) None of these are correct. 
A) the service rate and is denoted by λ. 
B) the service rate and is denoted by μ. 
C) the steady state. 
D) None of these are correct.

Question 19

The Grand Movie Theater has one box office clerk.On average,each customer that comes to see a movie can be sold a ticket at the rate of six per minute.For the theater's normal offerings of older movies,customers arrive at the rate of three per minute.Assume arrivals follow the Poisson distribution and service times follow the exponential distribution.
a.What is the average number of customers waiting in line?
b.What is the average time a customer spends in the waiting line?
c.What is the average number of customers in the system?
d.What is a customer's average time in the system?
e.What is the probability that someone will be buying tickets when an arrival occurs?
The Grand has booked the Stars Wars Trilogy and expects more customers.From conversations with other theater owners,it estimates that the arrival rate will increase to 10 per minute.Output is supplied for two- and three-cashier systems.
   ​
   ​
​

Accepted Answer

The answer of The Grand Movie Theater has one box...

Question 20

Little's flow equations

Accepted Answer

A) require Poisson and exponential assumptions. 
B) are applicable to any waiting line model. 
C) require independent calculation of W,L,Wq,and Lq. 
D) All of these are correct. 
A) require Poisson and exponential assumptions. 
B) are applicable to any waiting line model. 
C) require independent calculation of W,L,Wq,and Lq. 
D) All of these are correct.

Little's flow equations indicate that the relationship of L to L_q is the same as that of W to W_q.

Performance measures dealing with the number of units in line and the time spent waiting are called

When no limit is placed on how many units may seek service,the waiting line model

The total cost for a waiting line does NOT specifically depend on the

For many waiting line situations,the arrivals occur randomly and independently of other arrivals and it has been found that a good description of the arrival pattern is provided by a(n)

Models with a finite calling population

When blocked customers are cleared,an important decision is how many servers to provide.

In waiting line applications,the exponential probability distribution indicates that approximately 63% of the service times are less than the mean service time.

After the startup or transient period,a waiting system is in steady-state operation and considered to be the normal operation of the waiting line.

Operating characteristics formulas for the single-server queue do NOT require

If service time follows an exponential probability distribution,approximately 63% of the service times are less than the mean service time.

For a single-server waiting line,the utilization factor is the probability that an arriving unit must wait for service.

Before waiting lines can be analyzed economically,the arrivals' cost of waiting must be estimated.

Single-booth ticket sales at a theater are an example of which of the following queuing models?

The arrival rate in queuing formulas is expressed as the

The mean number of units that can be served per time period is called

Little's flow equations

Introduction

An Introduction to Linear Programming

Linear Programming: Sensitivity Analysis and Interpretation of Solution

Linear Programming Applications in Marketing, finance, and OM

Advanced Linear Programming Applications

Distribution and Network Models

Integer Linear Programming

Nonlinear Optimization Models

Project Scheduling: Pertcpm

Inventory Models

Simulation

Decision Analysis

Multicriteria Decisions

Time Series Analysis and Forecasting

Markov Processes

Linear Programming: Simplex Method

Simplex-Based Sensitivity Analysis and Duality

Solution Procedures for Transportation and Assignment Problems

Minimal Spanning Tree

Dynamic Programming

Filters

Exam 11: Waiting Line Models

Little's flow equations indicate that the relationship of L to Lq is the same as that of W to Wq.

Performance measures dealing with the number of units in line and the time spent waiting are called

When no limit is placed on how many units may seek service,the waiting line model

The total cost for a waiting line does NOT specifically depend on the

For many waiting line situations,the arrivals occur randomly and independently of other arrivals and it has been found that a good description of the arrival pattern is provided by a(n)

Models with a finite calling population

When blocked customers are cleared,an important decision is how many servers to provide.

In waiting line applications,the exponential probability distribution indicates that approximately 63% of the service times are less than the mean service time.

After the startup or transient period,a waiting system is in steady-state operation and considered to be the normal operation of the waiting line.​

Operating characteristics formulas for the single-server queue do NOT require

If service time follows an exponential probability distribution,approximately 63% of the service times are less than the mean service time.

For a single-server waiting line,the utilization factor is the probability that an arriving unit must wait for service.

Before waiting lines can be analyzed economically,the arrivals' cost of waiting must be estimated.

Single-booth ticket sales at a theater are an example of which of the following queuing models?

The arrival rate in queuing formulas is expressed as the

The mean number of units that can be served per time period is called

Little's flow equations

Introduction

An Introduction to Linear Programming

Linear Programming: Sensitivity Analysis and Interpretation of Solution

Linear Programming Applications in Marketing, finance, and OM

Advanced Linear Programming Applications

Distribution and Network Models

Integer Linear Programming

Nonlinear Optimization Models

Project Scheduling: Pertcpm

Inventory Models

Simulation

Decision Analysis

Multicriteria Decisions

Time Series Analysis and Forecasting

Markov Processes

Linear Programming: Simplex Method

Simplex-Based Sensitivity Analysis and Duality

Solution Procedures for Transportation and Assignment Problems

Minimal Spanning Tree

Dynamic Programming

Filters

Little's flow equations indicate that the relationship of L to L_q is the same as that of W to W_q.

After the startup or transient period,a waiting system is in steady-state operation and considered to be the normal operation of the waiting line.