Question 1

Explain continuous variables with an example.

Accepted Answer

Student examples may vary.Variables that

Question 2

Process simulation ________.

Accepted Answer

A) analyzes sample statistics empirically by repeatedly sampling the data and creating distributions of the statistics 
B) is the process of modeling chronological data 
C) is the process of changing key model inputs to determine their effect on the outputs 
D) is an approach for modeling the logical sequence of events as they take place 
A) analyzes sample statistics empirically by repeatedly sampling the data and creating distributions of the statistics 
B) is the process of modeling chronological data 
C) is the process of changing key model inputs to determine their effect on the outputs 
D) is an approach for modeling the logical sequence of events as they take place

Question 3

In the context of efficiency evaluation of a service operation,what does throughput mean?

Accepted Answer

A) It is the percentage of servers that are busy. 
B) It is the percentage of customers who balk. 
C) It is the rate at which customers are served. 
D) It is the rate at which customers jockey from one queue to another. 
A) It is the percentage of servers that are busy. 
B) It is the percentage of customers who balk. 
C) It is the rate at which customers are served. 
D) It is the rate at which customers jockey from one queue to another.

Question 4

Some customers may arrive at the system,determine that the line is too long,and decide not to join the queue.This kind of behavior is called jockeying.

Accepted Answer

A) True 
 B)False

Question 5

Determine the average time for which the workstation is used.

Accepted Answer

A) 75 seconds 
B) 57 seconds 
C) 45 seconds 
D) 30 seconds 
A) 75 seconds 
B) 57 seconds 
C) 45 seconds 
D) 30 seconds

Question 6

In queuing systems with multiple queues,customers switch lines if they perceive another to be moving faster.This kind of behavior is called ________.

Accepted Answer

A) balking 
B) jockeying 
C) reneging 
D) straddling 
A) balking 
B) jockeying 
C) reneging 
D) straddling

Question 7

Use the data given below to answer the following question(s).
Customers arrive at an airline ticket counter at the rate of three customers per minute and can be served at the rate of 4 customers per minute.
-What are the steps involved in the calculation of the average time a customer spends in the system?

Accepted Answer

From the given data,λ = 3 cust

Question 8

Which of the following is an example of a probabilistic arrival?

Accepted Answer

A) parts feeding from an automated machine to an assembly line 
B) people visiting a hair salon 
C) counseling sessions in allotted time frames 
D) teaching sessions at a university 
A) parts feeding from an automated machine to an assembly line 
B) people visiting a hair salon 
C) counseling sessions in allotted time frames 
D) teaching sessions at a university

Question 9

If the average arrival rate falls to 11,the average time a customer spends in the queue ________.

Accepted Answer

A) reduces by 14 seconds 
B) reduces by 7 seconds 
C) increases by 7 seconds 
D) increases by 14 seconds 
A) reduces by 14 seconds 
B) reduces by 7 seconds 
C) increases by 7 seconds 
D) increases by 14 seconds

Question 10

Use the data below to answer the following question(s).
Given: λ = customer arrival rate; μ = customer service rate; L = number of customers in the system; LS1U1B1qS1U1B0 = number of customers in the queue.
-In an FCFS system,Lq =   when μ > λ.

Accepted Answer

A) True 
 B)False

Question 11

Use the following scenario to answer the question(s)below.
Solomon operates a drive-in restaurant and is in charge of marketing and analysis; his son is in charge of delivery.The restaurant works as a single queue FCFS system.During the "lunch hour," which Solomon defines as the period from 12.30 p.m.to 2.30 p.m.,customers arrive randomly at an average of 30 customers per hour (or one customer every two minutes).A customer takes an average of three minutes to receive his order (or 20 customers per hour),but this fluctuates quite a bit due to variations in customer preferences.Solomon doesn't understand how a line could possibly pile up when his son can work faster than the rate at which customers arrive.Although customers complain a bit,they do not leave even if they have to wait.Solomon is particularly interested in understanding the waiting time,the number waiting,and how long his son is actually busy before considering improving his facility.
(Hint: Use SimQuick)
-The percentage of customers entering the process divided by the total number that tried to enter is ________.

Accepted Answer

A) 21.53 
B) 18.02 
C) 1.00 
D) 0.95 
A) 21.53 
B) 18.02 
C) 1.00 
D) 0.95

Question 12

Use the following scenario to answer the question(s)below.
Solomon operates a drive-in restaurant and is in charge of marketing and analysis; his son is in charge of delivery.The restaurant works as a single queue FCFS system.During the "lunch hour," which Solomon defines as the period from 12.30 p.m.to 2.30 p.m.,customers arrive randomly at an average of 30 customers per hour (or one customer every two minutes).A customer takes an average of three minutes to receive his order (or 20 customers per hour),but this fluctuates quite a bit due to variations in customer preferences.Solomon doesn't understand how a line could possibly pile up when his son can work faster than the rate at which customers arrive.Although customers complain a bit,they do not leave even if they have to wait.Solomon is particularly interested in understanding the waiting time,the number waiting,and how long his son is actually busy before considering improving his facility.
(Hint: Use SimQuick)
-The number of work cycles started in the work station is ________.

Accepted Answer

A) 21.53 
B) 18.02 
C) 60.33 
D) 38.80 
A) 21.53 
B) 18.02 
C) 60.33 
D) 38.80

Question 13

Discrete variables are often called state variables.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is an assumption of the Poisson process?

Accepted Answer

A) The probability of an arrival varies over time. 
B) The arrival rate is not stationary. 
C) Past arrivals do not influence future arrivals. 
D) Customers do not arrive independently of each other. 
A) The probability of an arrival varies over time. 
B) The arrival rate is not stationary. 
C) Past arrivals do not influence future arrivals. 
D) Customers do not arrive independently of each other.

Question 15

In queuing theory,what is the calling population?

Accepted Answer

A) It is the number of servers providing the service. 
B) It is the set of potential customers. 
C) It is the number of repair bays available. 
D) It is the number of technically qualified people handling customer queries. 
A) It is the number of servers providing the service. 
B) It is the set of potential customers. 
C) It is the number of repair bays available. 
D) It is the number of technically qualified people handling customer queries.

Question 16

Use the data given below to answer the following question(s).
Customers arrive at an airline ticket counter at the rate of three customers per minute and can be served at the rate of 4 customers per minute.
-Compute the probability that the system is empty.

Accepted Answer

From the given data,λ = 3 cust

Question 17

Use the model assumptions given below to answer the following question(s).
Assume Poisson arrivals with a mean arrival rate λ,exponential service times with mean service rate μ,a single server,and an FCFS queue discipline.
-Identify the formula that is used to determine the average number of customers in the queue (Lq).

Accepted Answer

A)    =   
B)    =   
C)    =   
D)    =   
A)    =   
B)    =   
C)    =   
D)    =

Question 18

Determine the time that you had to spend in the queue.

Accepted Answer

A) 9 minutes 20 seconds 
B) 10 minutes 57 seconds 
C) 9 minutes 57 seconds 
D) 10 minutes 20 seconds 
A) 9 minutes 20 seconds 
B) 10 minutes 57 seconds 
C) 9 minutes 57 seconds 
D) 10 minutes 20 seconds

Question 19

Use the data given below to answer the following question(s).
In an FCFS single server queuing discipline,the mean arrival rate is 12 customers/minute and the mean service rate is 14.5 customers/minute.
-Calculate the average number of customers in the queue.

Accepted Answer

A) 0.17 
B) 0.40 
C) 4.80 
D) 3.97 
A) 0.17 
B) 0.40 
C) 4.80 
D) 3.97

Question 20

According to the Poisson process in queuing systems,past arrivals do not influence future arrivals.

Accepted Answer

A) True 
 B)False

Explain continuous variables with an example.

Process simulation ________.

In the context of efficiency evaluation of a service operation,what does throughput mean?

Some customers may arrive at the system,determine that the line is too long,and decide not to join the queue.This kind of behavior is called jockeying.

Determine the average time for which the workstation is used.

In queuing systems with multiple queues,customers switch lines if they perceive another to be moving faster.This kind of behavior is called ________.

Which of the following is an example of a probabilistic arrival?

If the average arrival rate falls to 11,the average time a customer spends in the queue ________.

Use the data below to answer the following question(s). Given: λ = customer arrival rate; μ = customer service rate; L = number of customers in the system; L_q = number of customers in the queue. -In an FCFS system,L_q = when μ > λ.

Discrete variables are often called state variables.

Which of the following is an assumption of the Poisson process?

In queuing theory,what is the calling population?

Use the data given below to answer the following question(s). Customers arrive at an airline ticket counter at the rate of three customers per minute and can be served at the rate of 4 customers per minute. -Compute the probability that the system is empty.

Determine the time that you had to spend in the queue.

Use the data given below to answer the following question(s). In an FCFS single server queuing discipline,the mean arrival rate is 12 customers/minute and the mean service rate is 14.5 customers/minute. -Calculate the average number of customers in the queue.

According to the Poisson process in queuing systems,past arrivals do not influence future arrivals.

Data and Business Decisions

Descriptive Statistics and Data Analysis

Probability Concepts and Distributions

Sampling and Estimation

Hypothesis Testing and Statistical Inference

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters

Exam 12: Queues and Process Simulation Modeling

Explain continuous variables with an example.

Process simulation ________.

In the context of efficiency evaluation of a service operation,what does throughput mean?

Some customers may arrive at the system,determine that the line is too long,and decide not to join the queue.This kind of behavior is called jockeying.

Determine the average time for which the workstation is used.

In queuing systems with multiple queues,customers switch lines if they perceive another to be moving faster.This kind of behavior is called ________.

Which of the following is an example of a probabilistic arrival?

If the average arrival rate falls to 11,the average time a customer spends in the queue ________.

Use the data below to answer the following question(s). Given: λ = customer arrival rate; μ = customer service rate; L = number of customers in the system; Lq = number of customers in the queue. -In an FCFS system,Lq = when μ > λ.

Discrete variables are often called state variables.

Which of the following is an assumption of the Poisson process?

In queuing theory,what is the calling population?

Use the data given below to answer the following question(s). Customers arrive at an airline ticket counter at the rate of three customers per minute and can be served at the rate of 4 customers per minute. -Compute the probability that the system is empty.

Determine the time that you had to spend in the queue.

Use the data given below to answer the following question(s). In an FCFS single server queuing discipline,the mean arrival rate is 12 customers/minute and the mean service rate is 14.5 customers/minute. -Calculate the average number of customers in the queue.

According to the Poisson process in queuing systems,past arrivals do not influence future arrivals.

Data and Business Decisions

Descriptive Statistics and Data Analysis

Probability Concepts and Distributions

Sampling and Estimation

Hypothesis Testing and Statistical Inference

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters

Use the data below to answer the following question(s). Given: λ = customer arrival rate; μ = customer service rate; L = number of customers in the system; L_q = number of customers in the queue. -In an FCFS system,L_q = when μ > λ.