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・ Bottleneck (engineering)
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Bottleneck (production)
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Bottleneck (production) : ウィキペディア英語版
Bottleneck (production)

In production and project management, a bottleneck is one process in a chain of processes, such that its limited capacity reduces the capacity of the whole chain. The result of having a bottleneck are stalls in production, supply overstock, pressure from customers and low employee morale. There are both short and long-term bottlenecks. Short-term bottlenecks are temporary and are not normally a significant problem. An example of a short-term bottleneck would be a skilled employee taking a few days off. Long-term bottlenecks occur all the time and can cumulatively significantly slow down production. An example of a long-term bottleneck is when a machine is not efficient enough and as a result has a long queue.
An example is the lack of smelter and refinery supply which cause bottlenecks upstream.
Another example is in a surface-mount technology board assembly line with several pieces of equipment aligned. Usually the common sense is driven to set up and shift the bottleneck element towards the end of the process, inducing the better and faster machines to always keep the PCB supply flowing up, never allowing the slower ones to fully stop, a fact that would be heeded as a deleterious and significant overall drawback on the process.
== Identifying bottlenecks ==

Almost every system has a bottleneck, even if it is a minor one, if every system was running at full capacity, at least one machine would be accumulating processes. Identifying bottlenecks are critical for improving efficiency in the production line because it allows you to determine the area where accumulation occurs. The machine or process that accumulates the longest queue is usually a bottleneck, however this isn't always the case. Bottlenecks can be found through: identifying the areas where accumulation occurs, evaluating the throughput, assessing whether each machine is being used at full capacity and finding the machine with the high wait time.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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