Bottleneck

A bottleneck is, generally in a physical process, a narrow point which causes a clogging.

The expression refers to “narrow part”, nautical term which indicates a narrow passage at the entry of roads. It is often transformed into “bottleneck” by reference to the tightened neck of a bottle.

Transport

In the field of the Transport, a bottleneck is for example a portion of narrower road, a section of highway with less roadways or railway with a more reduced number of ways, compared to the remainder of the course. It is often a situation created by a bridge or a tunnel, a section in sliced or by a section in work.

" definition; industrielle" of a bottleneck: not process responsible for the limitation of production capacity.

Definition in the field of the Operation and Production control: Work station whose cycle of production is longest or the work station whose rate is weakest. The presence of piles of products in progress is an index of the presence of a bottleneck, one cannot however always identify the bottleneck by the quantity of products in progress.

Data processing

In the field of the Data-processing , a bottleneck is a point of a system limiting the total performances, and which can have an effect over the answer and processing times. The bottlenecks can be hardware and/or software.

  • In the first case, it is under dimensioning of a element of the physical Architecture which has an effect on operation of the other elements. The limiting element of an architecture is always the weakest element. For example, a bottleneck can be created by a Routeur functioning in 100Mb in a network in 1Gb.

  • In the second case, it is the lack of Efficacité of a software Module which has an effect on the total performances of the Logiciel. A bottleneck can be created by the recording not bufferized (not use of the bufferized writing) of results inside a Boucle of calculation. The recording being a very slow operation, the Processeur then spends its time waiting until the results are written instead of carrying out calculations.

See too

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