Ch. 10 Quiz

The customer arrivals in a queuing system come almost exclusively from infinite populations

False

The term "queue discipline" involves the art of controlling surly and unruly customers who have become irritated by waiting

False A queue discipline is a priority rule or set of rules for determining the order of service to customers in a waiting line

Spreadsheet simulations have become obsolete due in part to specialized computer simulation languages like SLAM or SIMAN

False As a last comment on simulation programs, do not rule out spreadsheets for simulation

A tellers window in a bank is an example of a single-channel, muliphase queuing system

False Tellers windows in a bank and checkout counters in high-volume department stores exemplify the multichannel, single-phase type of structure

Gas stations, loading docks, and parking lots have infinite potential length of lines for their respective queuing sysems

False they have limited line capacity caused by legal restrictions or physical space charactersitics

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

Which of the following is an example of a finite population in a queuing system?

The department faculty in line at the copier

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

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

The central problem in virtually every waiting line situation is a decision balancing the costs of adding services with the costs of waiting

True

The demand on a hospitals emergency medical services is considered an uncontrollable arrival pattern of the calling population

True

in a department 25 machines are kept running by three operators who respond to randomly occuring 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

Assume the service rate for a queue in a truck-loading operation is 2 trucks per hour. Using the infiine queuing notion for the models presented in the textbook, which of the following is the average service time?

0.5 hours average service time = 1/ average service rate= 1/2 = 0.5

In modeling a simulation, random numbers from 00 to 99 are assigned with the intervals determined from frequency distriutions for each behavior occurence. 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?

00 to 39

In modeling a simulation, random numbers from 00 to 99 are assigned with the intervals determined from frequency distributions for each behavior occurence. 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?

00 to 44

Which of the following queue disciplines is discussed in the textbook?

Emergencies first

The customer arrivals in a queuing system come almost exclusively from finite populations

False Arrivals at a service systemmay be drawn from a finite or infinite population. The distinction is important because the analyses are based on different premisesand require differenect equations for their solution

Best contomer last is a queue discipline discuess in the textbook

False Reservations first, emergencies first, hgihest -profit customer first, largest orders first, best customer first, longest waiting time in line, and soonest promised date are other examples of priority rules

Arrival characteristics in a queuing problem analysis include the length of the queue

False The queuing system consists essentially of three major components 1) the source popultion and the way customers arrive at the system 2) the servicing system 3) the condition of the customers exiting the system Also, the queuing system consists primarily of the waiting lines and the available number of servers

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

A variable arrival rate is more common in waiting line management than a constant arrival rate

True

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 probability

True

Which of the following is a suggestion for managing queues presented in the textbook?

train your servers to be friendly