Question 1

An automatic,drive-through car wash is an example of a:

Accepted Answer

A) single-channel,single-phase arrangement. 
B) single-channel,multiple-phase arrangement. 
C) multiple-channel,single-phase arrangement. 
D) multiple-channel,multiple-phase arrangement. 
A) single-channel,single-phase arrangement. 
B) single-channel,multiple-phase arrangement. 
C) multiple-channel,single-phase arrangement. 
D) multiple-channel,multiple-phase arrangement.

Question 2

Comment on the tension between cost management and customer satisfaction management in a call center situation.

Accepted Answer

Cost control in a call center situation

Question 3

Customers arrive at the local grocery store at a steady rate of 40 an hour.Thirty percent of these customers purchase 10 items or less and go to the express line where they enjoy an average checkout time of 5 minutes.Customers that don't meet the express line criterion go to checkout line #2 where they spend an average of 10 minutes checking out.How many people are checking out in both lines on average?

Accepted Answer

A) less than or equal to 1.0 
B) greater than 1.0 but less than or equal to 3.0 
C) greater than 3.0 but less than or equal to 5.0 
D) greater than 5.0 
A) less than or equal to 1.0 
B) greater than 1.0 but less than or equal to 3.0 
C) greater than 3.0 but less than or equal to 5.0 
D) greater than 5.0

Question 4

In a waiting-line problem,assigning additional employees to a service facility will have a direct effect on:

Accepted Answer

A) the line arrangement. 
B) service rates. 
C) the size of the customer population. 
D) the number of service phases. 
A) the line arrangement. 
B) service rates. 
C) the size of the customer population. 
D) the number of service phases.

Question 5

In the single-server model the:

Accepted Answer

A) customers are assumed to arrive at constant intervals of time. 
B) variability of customer arrivals is most often described by a Poisson distribution. 
C) mean of the distribution of customer arrivals must be greater than the variance of customer arrivals to get meaningful results. 
D) probability of n arrivals in T time periods comes from a normal distribution. 
A) customers are assumed to arrive at constant intervals of time. 
B) variability of customer arrivals is most often described by a Poisson distribution. 
C) mean of the distribution of customer arrivals must be greater than the variance of customer arrivals to get meaningful results. 
D) probability of n arrivals in T time periods comes from a normal distribution.

Question 6

A(n)________ selects the next customer to be served at the service facility.

Accepted Answer

The answer of A(n)________ selects the next customer to be...

Question 7

In the single-server model the:

Accepted Answer

A) service time of a customer is most often described by an exponential distribution. 
B) service time depends on the number of customers in the system as long as there is at least one customer in the waiting line. 
C) mean of the service-time distribution must be as great as the target service time for a feasible solution. 
D) service times are always constant to avoid large waiting lines. 
A) service time of a customer is most often described by an exponential distribution. 
B) service time depends on the number of customers in the system as long as there is at least one customer in the waiting line. 
C) mean of the service-time distribution must be as great as the target service time for a feasible solution. 
D) service times are always constant to avoid large waiting lines.

Question 8

The standard assumption in the single-server model is that there is an infinite number of customers and that customers will wait in line as long as it takes to get served.

Accepted Answer

A) True 
 B)False

Question 9

Students arrive at a university business library during peak evening hours at a rate of 40 students every half hour.A periodic count shows that there are 200 students in the library at any one time.On average,how long is each student's stay in the library?

Accepted Answer

A) less than or equal to one hour 
B) greater than 1.0 but less than or equal to 2.0 hours 
C) greater than 2.0 but less than or equal to 3.0 hours 
D) greater than 3.0 hours 
A) less than or equal to one hour 
B) greater than 1.0 but less than or equal to 2.0 hours 
C) greater than 2.0 but less than or equal to 3.0 hours 
D) greater than 3.0 hours

Question 10

With a finite-source model,increasing the arrival rate by 10 percent and also increasing the service rate by 10 percent will result in:

Accepted Answer

A) a decrease in the utilization of the server. 
B) no change in the average number of customers in the system. 
C) an increase in the average number of customers in the waiting line. 
D) an increase in the waiting time in line. 
A) a decrease in the utilization of the server. 
B) no change in the average number of customers in the system. 
C) an increase in the average number of customers in the waiting line. 
D) an increase in the waiting time in line.

Question 11

The average lead time of a unit of product through a manufacturing station is 18 minutes.The average work-in-process inventory at this station has been 30 pieces.What is the production rate?

Accepted Answer

A) 0)33 piece per minute 
B) 0)83 piece per minute 
C) 1)66 pieces per minute 
D) 3)0 pieces per minute 
A) 0)33 piece per minute 
B) 0)83 piece per minute 
C) 1)66 pieces per minute 
D) 3)0 pieces per minute

Question 12

The best method for analyzing a waiting-line problem is to relate the five operating characteristics and their alternatives to dollars.

Accepted Answer

A) True 
 B)False

Question 13

With a single-server model,increasing the capital-to-labor ratio will most likely:

Accepted Answer

A) increase the utilization of the server. 
B) have no effect on the operating characteristics because they are affected only by work-methods changes. 
C) decrease the probability that there are zero customers in the system at any time. 
D) decrease the average number of customers in the waiting line. 
A) increase the utilization of the server. 
B) have no effect on the operating characteristics because they are affected only by work-methods changes. 
C) decrease the probability that there are zero customers in the system at any time. 
D) decrease the average number of customers in the waiting line.

Question 14

Scenario B.4
Customers arrive at an airline ticket counter at the rate of 50 customers per hour,according to a Poisson distribution.There are three ticket agents.Customers select the first available agent from one line.Each agent can process 20 customers per hour with exponential service times.
-Use the information in Scenario B.4.What is the average utilization of the three-agent system?

Accepted Answer

A) less than or equal to 80 percent 
B) greater than 80 percent but less than or equal to 85 percent 
C) greater than 85 percent but less than or equal to 90 percent 
D) greater than 90 percent 
A) less than or equal to 80 percent 
B) greater than 80 percent but less than or equal to 85 percent 
C) greater than 85 percent but less than or equal to 90 percent 
D) greater than 90 percent

Question 15

The best example of a finite customer population is the:

Accepted Answer

A) car-buying public of an automotive manufacturer. 
B) constituents in a precinct lining up to vote. 
C) e-mail messages arriving at a major ISP mail server. 
D) members of the Management department at your university waiting to speak to the Dean about their department chairman. 
A) car-buying public of an automotive manufacturer. 
B) constituents in a precinct lining up to vote. 
C) e-mail messages arriving at a major ISP mail server. 
D) members of the Management department at your university waiting to speak to the Dean about their department chairman.

Question 16

________ is a fundamental law that relates the number of customers in a waiting-line system to the waiting time of customers.

Accepted Answer

The answer of ________ is a fundamental law that relates...

Question 17

A drive-through system at a fast food restaurant where the first facility takes the order,the second takes the money,and the third provides the food is an example of a:

Accepted Answer

A) single-channel,single-phase arrangement. 
B) single-channel,multiple-phase arrangement. 
C) multiple-channel,single-phase arrangement. 
D) multiple-channel,multiple-phase arrangement. 
A) single-channel,single-phase arrangement. 
B) single-channel,multiple-phase arrangement. 
C) multiple-channel,single-phase arrangement. 
D) multiple-channel,multiple-phase arrangement.

Question 18

The calling population in a queuing problem must go to the server,that is servers do not go to the calling population.

Accepted Answer

A) True 
 B)False

Question 19

A ________ is one or more facilities required to perform a given service.

Accepted Answer

The answer of A ________ is one or more facilities...

Question 20

Customers are serviced at a rate of five customers per hour according to an exponential distribution.What is the probability that customer service will require fewer than 20 minutes?

Accepted Answer

A) less than or equal to 0.75 
B) greater than 0.75 but less than or equal to 0.80 
C) greater than 0.80 but less than or equal to 0.85 
D) greater than 0.85 
A) less than or equal to 0.75 
B) greater than 0.75 but less than or equal to 0.80 
C) greater than 0.80 but less than or equal to 0.85 
D) greater than 0.85

Exam 17: Waiting Lines

An automatic,drive-through car wash is an example of a:

Comment on the tension between cost management and customer satisfaction management in a call center situation.

In a waiting-line problem,assigning additional employees to a service facility will have a direct effect on:

In the single-server model the:

A(n)________ selects the next customer to be served at the service facility.

In the single-server model the:

The standard assumption in the single-server model is that there is an infinite number of customers and that customers will wait in line as long as it takes to get served.

Students arrive at a university business library during peak evening hours at a rate of 40 students every half hour.A periodic count shows that there are 200 students in the library at any one time.On average,how long is each student's stay in the library?

With a finite-source model,increasing the arrival rate by 10 percent and also increasing the service rate by 10 percent will result in:

The average lead time of a unit of product through a manufacturing station is 18 minutes.The average work-in-process inventory at this station has been 30 pieces.What is the production rate?

The best method for analyzing a waiting-line problem is to relate the five operating characteristics and their alternatives to dollars.

With a single-server model,increasing the capital-to-labor ratio will most likely:

The best example of a finite customer population is the:

________ is a fundamental law that relates the number of customers in a waiting-line system to the waiting time of customers.

A drive-through system at a fast food restaurant where the first facility takes the order,the second takes the money,and the third provides the food is an example of a:

The calling population in a queuing problem must go to the server,that is servers do not go to the calling population.

A ________ is one or more facilities required to perform a given service.

Customers are serviced at a rate of five customers per hour according to an exponential distribution.What is the probability that customer service will require fewer than 20 minutes?

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