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 ?
Also, rationing by queuing is subject to more serendipity, with the competitive rules less clear and more subject to gaming (for example, cutting in line under the pretense that a friend was saving the place for you) than is the case when rationing is done by price.
Virtual queuing addresses customer satisfaction because waiting on hold is a major source of customer complaints.
However, applications modified to take advantage of queuing will see the best performance improvements.
For most people maths is a no-go area and someone like myself has quirkiness associated with them, whether it be because of the queuing or another branch of mathematics.
Queuing at airports makes us feel secure - home from home - as though we're not really going away and leaving the post uncollected, the plants without water and the video player pre-set to record Countdown.
Combining the ability to act on packet information with queuing and buffering techniques similar to ATM-based systems, and traffic parameters on aggregated ATM circuits, IP-intelligent concentrators deliver the service quality each traffic type requires, for every user.
Virtual queuing is a solution that improves contact center efficiency and increases customer satisfaction.
And three out of five of those who took part in a survey thought that queuing was a national obsession in the UK.
Serial ATA Native Command Queuing will significantly increase I/O performance in entry-level server systems, compared with servers using other Serial ATA or Parallel ATA solutions.
Virtual queuing allows customers who are presented with hold time to choose a callback instead of waiting on the line.
After queuing for 40 minutes and then getting to the front of the queue, we were promptly told by the rudest woman I have ever met that we were in the wrong queue and had to queue again because we had the wrong colour tickets