MKTG 372 Chapter 10
T/F A constant arrival rate is more common in productive systems than a variable arrival rate.
False
T/F A car wash is an example of a single-channel, multiphase queuing system.
True
T/F A variable arrival rate is more common in waiting line management than a constant arrival rate.
True
T/F Being user-friendly and easy to understand is considered a desirable feature of simulation software systems
True
T/F General-purpose simulation software (GPSS) is really a computer language that allows programmers to build their own simulation models.
True
T/F Highest-profit customer first is a queue discipline discussed in the textbook.
True
T/F Ideally, in waiting line or queuing analysis, we want to balance the cost of service capacity with the cost of waiting.
True
T/F In a department 25 machines are kept running by three operators who respond to randomly occurring equipment problems. An analyst who wanted to know how much production was being lost by machines waiting for service could use queuing theory analysis to find out.
True
T/F In a department 25 machines are kept running by three operators who respond to randomly occurring equipment problems. When an operator is not immediately available for servicing a machine having a problem, the amount of production being lost by machines waiting for service increases. An analyst can use queuing theory analysis to determine whether to pay overtime to get an operator from a different shift or not.
True
A roller coaster ride in an amusement park employs which type of queuing system line structure?
Single channel, single phase
Getting an autograph from a famous person might involve standing in which type of queuing line structure?
Single channel, single phase
T/F Special-purpose simulation software is specially built to run specific applications and may have provisions in manufacturing models to allow for specifying the number of workcenters, their descriptions, arrival rates, and even batch sizes.
True
T/F The Poisson probability distribution is used in waiting line management when one is interested in the number of arrivals to a queue during some fixed time period.
True
T/F The central problem in virtually every waiting line situation is a decision balancing the costs of adding services with the costs of waiting.
True
T/F The demand on a hospital's emergency medical services is considered an uncontrollable arrival pattern of the calling population.
True
T/F There are different queuing models to fit different queuing situations.
True
In a college registration process, several department heads have to approve an individual student's semester course load. What is the queuing system line structure?
Single channel, multiphase
Which of the following is a suggestion for managing queues presented in the textbook?
Train your servers to be friendly
T/F Being user-friendly and easy to understand typically means that the simulation produces less accurate results.
False
T/F Best customer last is a queue discipline discussed in the textbook.
False
T/F Gas stations, loading docks, and parking lots have infinite potential length of lines for their respective queuing systems.
False
T/F Having animation capabilities to graphically display product flows through a production system is not considered a desirable feature of simulation software systems.
False
T/F In a practical sense, a finite population is one that potentially would form a very long line in relation to the capacity of the serving system.
False
T/F In a practical sense, an infinite queue is one that includes every possible member of the served population.
False
T/F Spreadsheet simulations have become obsolete due in part to specialized computer simulation languages like SLAM or SIMAN.
False
T/F The admissions system in a hospital for patients is an example of a single-channel, single-phase queuing system.
False
T/F The customer arrivals in a queuing system come almost exclusively from finite populations
False
T/F The customer arrivals in a queuing system come almost exclusively from infinite populations.
False
T/F The demand on a hospital's emergency medical services is considered a controllable arrival pattern of the calling population.
False
T/F The leading general- and special-purpose simulation models follow a well-documented and standardized approach.
False
T/F The more time, money, and effort you spend developing a simulation model, the more likely you are to achieve useful results.
False
T/F The term "queue discipline" involves the art of controlling surly and unruly customers who have become irritated by waiting.
False
T/F While spreadsheets can be somewhat useful for a variety of simulation problems, they can be confusing and are vulnerable to several drawbacks, including weak routines for random-number selection.
False
In modeling a simulation, random numbers from 00 to 99 are assigned with the intervals determined from frequency distributions for each behavior occurrence. Assume there are two behaviors, X and Y, out of 50 tallies. On behavior X you record 20 tallies, and on behavior Y you record 30 tallies. Which of the following is a correct random-number interval for behavior X?
0 to 39
In modeling a simulation, random numbers from 00 to 99 are assigned with the intervals determined from frequency distributions for each behavior occurrence. Assume there are two behaviors, A and B, out of 100 tallies. On behavior A you record 45 tallies, and on behavior B you record 55 tallies. Which of the following is a correct random-number interval for behavior A?
0 to 44
A company is concerned about the number of customers who have to wait for service in its customer service department. Assume the rate at which customers are serviced is 12 per hour. Using the infinite queuing notion for the models presented in the textbook, which of the following is the mean time between arrivals?
0.0833 hours
For an infinite queuing situation, if the arrival rate for loading trucks is 5 trucks per hour, what is the mean time between arrivals?
0.2 hours
Assume the service rate for a queue in a truck-loading operation is 2 trucks per hour. Using the infinite queuing notion for the models presented in the textbook, which of the following is the average service time?
0.5 hours
Which of the following is a suggestion for managing queues that is mentioned in the textbook?
Segment the customers
Machine breakdown and repair in a 12-machine factory having one repair mechanic would develop which type of queuing system line structure concerning machine breakdowns?
Single channel,
A small vendor has either a good day of sales with an average of $1,000 or a bad day with an average of only $500 for the day. To simulate these outcomes, random numbers from 00 to 99 should be assigned with the intervals determined from the frequency distribution. If, during the last 100 days, the vendor had 27 good days and 73 bad days, which of the following is a correct random-number interval for a bad day?
27 to 99
T/F Regardless of the computer language chosen for a simulation model, too much data from a simulation can be dysfunctional to problem solving.
True
Which of the following is not a suggestion for managing queues presented in the textbook?
Determine an acceptable waiting time for customers
Which of the following queue disciplines is discussed in the textbook?
Emergencies first
T/F A finite population in waiting line management refers to a population that is large enough in relation to the service system so that the change in population size caused by subtractions or additions to the population does not significantly affect the system probabilities.
False
T/F A tellers' window in a bank is an example of a single-channel, multiphase queuing system.
False
T/F Arrival characteristics in a queuing problem analysis include the length of the queue.
False
Which of the following is not a queue discipline discussed in the textbook?
Last in, first out
Buying a ticket for a college football game where there are multiple windows at which to buy the ticket features which type of queuing system line structure?
Multichannel, single phase
Buying food at a large food store with multiple checkout counters features which type of queuing system line structure?
Multichannel, single phase
Machine breakdown and repair in a 12-machine factory having three repair mechanics would develop which type of queuing system line structure concerning machine breakdowns?
Multichannel, single phase
Standing in line to buy a ticket for a movie where there are multiple windows at which to buy tickets is which type of queuing system line structure?
Multichannel, single phase
Which of the following is not a suggestion for managing queues presented in the textbook?
Periodically close the service channel to temporarily disperse the line.
Which of the following is an example of a finite population in a queuing system?
The departmental faculty in line at the copier
In essence, a queuing system includes several major components. Which of the following is not one of them?
The queue discipline
Which of the following are the three major components of a queuing system?
The source population, how the customer exits the system, and the servicing system
The source population, how the customer exits the system, and the servicing system
Train your servers to be friendly
T/F An infinite population in waiting line management refers to a population that is large enough in relation to the service system so that the change in population size caused by subtractions or additions to the population does not significantly affect the system probabilities
True
T/F Being able to permit interactive debugging of a model so the user can trace flows through the model and more easily find errors is considered a desirable feature of simulation software systems.
True
T/F In a department, 25 machines are kept running by three operators who respond to randomly occurring equipment problems. An analyst wanting to know whether to add a fourth operator or downsize to two operators would be helped by using queuing theory analysis.
True
T/F In a waiting line situation, multiple lines occur only when there are multiple servers.
True
T/F Longest waiting time in line is a queue discipline discussed in the textbook.
True
