information and decision making part 3 (5) Flashcards
_____ is the mathematics of waiting lines. It is extremely useful in predicting and evaluating system performance.
queuing theory
____ has been used for operations research, manufacturing and system analysis.
queuing theory
____ queuing theory problems refer to customers visiting a store, analogous to requests arriving at a device.
traditional
What are the key elements of the queuing systems?
customer, server
____ refers to anything that arrives at a facility and requires service, e.g. people, machines, trucks, emails.
customer
_____ refers to nay resource that provides the requested service, e.g. repairpersons, retrieval machines, runways at airport.
server
The queuing system has four major components: ____
input/arrival process, queue or waiting line, service process or the server, output/exit
____ is when the customers arrive.
input or the arrival process
_____ is the crucial element of a queuing system, as it shows the queue discipline.
queue structure
____ is the order in which the customers are picked from the queue for the service.
queue discipline
____ depends on the arrival of customers and the nature of service being offered.
queue discipline
The customers can be chosen from the queue in one of the following ways: ____
first-come-first-served, last-come-first-served, service-in-random-order (SIRO), priority service
When the services are rendered to the customers in order of their arrival, the queue discipline is the ______.
first-come-first-served
When the services are rendered to the customers in order of their arrival, the queue discipline is the ______.
first-come-first-served
It simply means, the person who comes last will be served first.
last-come-first-served
Under this type of queue structure, the customer is chosen for service randomly and hence all the customers are equally likely to be selected.
service-in-random-order (SIRO)
Under this rule, customers are grouped in priority classes on the basis of some attributes such as service time, or urgency or according to some identifiable characteristic, and FCFS rule is used within each class to provide service.
priority service
_____ mean, a number of channels providing identical service facilities so that several customers may be served simultaneously.
parallel channels
____ means a customer go through successive ordered channels before service is completed.
series channel
A ____ is called a one-server model, i.e., when the system has only one server, and a multi-server model i.e., when the system has a number of parallel channels, each with one server.
queuing system
What are the arrangement of service facilities in series?
single queue single server, sing queue multiple server
What are the three customer characteristics/attitude?
balking, reneging, jockeying
Customer decides not to join the queue by seeing the number of customers already in service system.
balking
“I’m not going to wait in that line.”
balking
