What is a bottleneck?

A bottleneck generalls refers to overloading in production that leads to hamper the production line all together which stops the production all together.
This happens when their is over work load than the regular work, which hampers the overall production process.
Bottleneck reduces the efficiency and productivity of the firm. To avoid bottleneck firms should be better prepared and analyse the production process and forecast that what is the actual capacity of the plant or machinery to function properly.