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 ?
If none are available, the incoming trailer will be put into a trailer waiting line. Whenever a new incoming trailer arrives or a receiving door becomes empty, the simulation model checks if it needs to apply a trailer scheduling policy to assign a waiting trailer to an available receiving door, as illustrated in Figure 4.
Waiting-line theory--The theory of how waiting lines behave; same as queuing theory.
Table 1 Waiting Line Segmentation At A Service Rate Of 11.75 Customers Per Hour Average Number Average Arrival of Number Cost Segment Rate Servers in Queue C1 I 22.25 2 16.39 (highest) II 1 1 0.01 C2 I 21.25 2 8.11 II 2 1 0.04 C3 I 20.25 2 4.97 II 3 1 0.09 C4 I 19.25 2 3.34 II 4 1 0.18 C5 I 18.25 2 2.36 (lowest) II 5 1 0.32 Average Average Time in Time in Cost Queue System C1 0.74 hrs.
The last type of waiting line shown in Figure 11-1 is the most complicated to manage: the multichannel, multiphase queue system.
Weve seen a stark increase in wait times for state-funded treatment options too; the current waiting line is almost 900 people long.
The project is intended to move the frequent waiting line of left-turning vehicles at the Loves Travel Stop away from the I-65 ramps, said Matt Bullock, chief district engineer for the Department of Highways District 5 Office in Louisville.
2-component cold plastic (650 and 800 g/m2): Guideline white 100000 m, leadership and waiting line of 20,000 units, 60,000 m bike lanes yellow, white edge line of 160,000 m, 15,000 m crossings , Various small markings.
In order to improve the mechanisms of social housing distribution and increase the transparency of these processes, the Unified Republican Automated Database of Waiting Lines is being created.
Generally speaking, the 'take-a-number' system is designed to bring order to waiting lines and ensure customers don't have to stand for long periods.
Waiting lines for airport ground transportation can be especially long and time-consuming over the holidays--better to have a car waiting.
default:svg width="23" height="23default:use xlink:efault:useefault:svdefault:svg width="22" height="22default:use xlink:efault:useefault:svSeveral foreigners have recently complained about the return of long waiting lines in front of the Foreigners' Police new building on Regruacutetska Street in Bratislava."Once again, terrible experience at the foreigners' police," wrote Evan Konstantinopoulos on October 8 on Facebook, describing how five years after his first registration in Slovakia, he had the unpleasant experience of visiting the Foreigners' Police department in Bratislava.
Khalaf also asserted that works also included installing new traffic signals, lights, and painting new road markings, each of which will help to ensure road safety, noting that the project will reduce the waiting lines on the Riffa Avenue by 45%, and increase the avenue's capacity by 12%.