queue

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Related to queuing: Queuing theory, Priority queuing

Queue

An ordered collection of persons or things in which one is serviced after another. For example, persons may form a queue to buy tickets to the cinema. Likewise, an employee may form a list of tasks to be done each day and perform them each in turn. The word queue is most common in Britain and the Commonwealth; the equivalent in American English is waiting line or simply line.

queue

the build-up of customers who are delayed while waiting for service. Queuing can occur in a retail outlet where shoppers queue at supermarket checkouts or cars queue on petrol station forecourts. Similar queuing problems occur in factories where components queue to be processed on machines.

Variability in the demand for service and the variable time to complete service makes it difficult to judge the level of service to provide for customers. Where numerous service channels are provided, customers will experience few delays even when many customers arrive simultaneously for service. On the other hand, providing numerous service channels involves large labour costs, as in the case of supermarket checkout staff or bank clerks, or large investment in physical facilities, such as tanker berths or airport runways.

Queuing models employing statistical techniques can be used to analyse queues and to balance the cost of resources used to provide service against the cost of the time lost by customers while waiting for service.

These models consider the number of potential customers; the likely rate at which they arrive; whether they arrive singly or in batches; the number of parallel queues; maximum queue length; order of service (first come, first served or prioritized); number of servers; likely service time; and whether customers are served singly or in batches. For complex queues, SIMULATION techniques may be employed to decide the level of service to provide and how to organize the service facilities. See BALK, MULTIPLE CHANNEL-SINGLE PHASE.

References in periodicals archive ?
While Smartmatic might say that the queuing servers were meant to ensure the accuracy of the transmissions, Sotto questioned why they were installed only on May 10 to 11.
This section presents a performance evaluation of eight-queue management algorithms, namely, Drop Tail (DT), Random Early Detection (RED), Virtual Queue (VQ), Fair Queuing (FQ), Stochastic Fair Queuing (SFQ), Random Exponential Marking (REM), Deficit Round Robin (DRR), and Proportional Integrated (PI).
Allen, "Probability, Statistics and Queuing Theory, with computer Science Applications," Academic Press, Boston., 2nd edition, 1990.
" Two-level Stochastic Fluid Tandem Queuing Model for Burst Impact Analysis", IEEE Conference on Decision and Control, pp: 3042-3047.
Although retailers merchandise their queuing lines with impulse items, the research from Dechert-Hampe Consulting's research suggests that the conversion rates for products in queuing lines are lower than in conventional lanes.
Considering queuing delay, packet loss, traffic sent and received.
In the States, you're robbed of the ability to complain about the length of time you have been queuing for, but a glance at your watch will confirm that, cumulatively, the Americans out-do the Brits in the queuing stakes, they just manage to distract your attention while doing so.
Speaking to people while in a queue for one of the food outlets, they told me they had missed three races due to queuing to get in on the charge-card, so clearly also this needs a review.
The EDF London Eye has agreed to participate in the first UK pilot of Lo-Q's smartphone-based ticketing and queuing system to evaluate the potential of the technology.
My powers of queuing are best in evidence when I am next in line to use a cash machine.
"As well as queuing at the ticket office, fans can use the internet."
Its designers say they came up with the invention in an effort to keep alive the atmosphere and frustrations of the queuing struggle so that the younger people may not take the comforts of their life for granted.