queue

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Related to waiting line: Waiting Line Theory

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 ?
Since our algorithms are time-oriented, we mainly measure the average "total time" needed for a pallet starting from arriving at the trailer waiting line to leaving a crossdock at the shipping side.
A Field Study and end-of-chapter questions have been added to Chapter 12, Managing Waiting Lines.
Winant said he is not sold on the need for early voting, especially for municipal elections when turnout is usually on the low side and waiting lines don't exist.
Summary: Thousands of students seeking admission to kindergarten classes at Dubai's popular Indian High School will now register online, avoiding the long waiting lines which have historically plagued the application process.
The long waiting lines of Albanian migrant workers when entering Macedonia are aimed at demotivating them and making the renounce their Macedonian citizenships.
However, holding on to passports - for several days in many cases - means longer waiting lines for applicants already pressed for time under the looming deadline.
First, it hinders routine medical care, which, when there is no family doctor, is dispensed at walk-in clinics with endless waiting lines.
Eventually, smart tcchies dumbed down the process so much that it could even be delegated to shoppers, and self-checkout was born with the promise of labor savings and reduction of waiting lines.
The truck waiting lines on the Latvian-Russian border, a common event, began to grow this year at the beginning of August, when the Russian Customs Service strengthened control, in other words, began its harassment, over all cargo transported by Lithuanian carriers.
As opposed to standard waiting lines, the network in Figure 1 below contains the flow decomposition (e.
A mixture of fashion, vanity, commodity fetishism, and greed sharpened by clever, no-holds-barred advertising created the fantasy of the automobile as a liberator from schedules, waiting lines, limited horizons, pre-established routes.
Already this 'shortage' has led to long waiting lines of trucks outside all cement plants of the region.