Bottleneck
In short. A bottleneck is the step in a process with the lowest capacity, which limits how much the whole process can produce. Work queues up in front of it and later steps wait. Improving anything other than the bottleneck does not increase overall output.
Last checked against its sources on 10 October 2026. How we write these.
The name comes from the neck of a bottle, which restricts flow however much liquid is in the body. In a business, the narrow point might be a person, a machine, an approval or a system.
Finding it means looking for where work waits. A design studio may have fast designers but one director who signs off every piece. The queue forms at sign-off, so hiring another designer would simply lengthen the queue.
Once found, the options are to use the bottleneck fully, to remove work from it that does not need to be there, to add capacity, or to change the process to avoid it. Training a second person to approve routine items, for instance, can relieve the pressure without a new hire.
Bottlenecks move. Fix one and the next constraint becomes the limit, which is why it is worth checking again after each change. They also overlap with dependence on key people, because a person who is the bottleneck is often also a single point of failure.
Questions people ask
How do I spot a bottleneck?
Look for queues, waiting work and people who are always busy while others wait for them. Measuring how long work spends at each step usually shows it clearly.
Is a bottleneck always a problem?
It is the natural limit on output, so it matters when it holds back what customers want. If demand is below that limit, it may not need attention yet.
Sources
- What's Your Company's Bottleneck? – Lean Enterprise Institute checked 10 October 2026