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Related to queues: Priority queues


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.


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 ?
However, fleet communicators must understand the capabilities and limitations of using fleet email queues as an indicator of DoDIN connectivity.
The immigration counters had a single queue with multiple servers.
Traffic wardens should ensure that motorists do not make second queue and also see that traffic is allowed to cross the intersections in areas where CNG stations are located, he said.
What's important about this new app is that it helps children to create their own independent queue", said Farzad Wafapoor, Directing Manager of AdvanTech Media, "this way, parents' queue is totally separate from children's queue, and kids will not bump into inappropriate movie titles when sifting through genres or the queue screen".
Deep down we like queues so we can moan about them.
com)-- Qender Pte Ltd, launched the free Qender Mobile Queue app on iOS 5.
He said: "There were a lot of people in front of me when I joined the queue.
But at the bottom of the table, with much smaller queues, were clothes shops, with an average of four minutes, and bus stations, with a wait of 3.
And it is likely that high-demand consumers will be outcompeted, and will suspect unfairness as the reason, when goods are rationed by queues.
He said: "If you're at the supermarket you look at the length of the queues and how large the shopping trollies are.
HUNDREDS of shoppers and office workers hit Great Portland Street post office and long queues lasted all day.
However, these queues tend to move quite rapidly and, by publishing an estimated queuing time as opposed to a performance figure, Testa would be able to manage customer perception much better.