Which of the following best describes a bottleneck in a process?

A bottleneck in a process refers specifically to a point in the workflow that restricts or limits the overall output of the entire system. It is typically the slowest step that creates a situation where further output cannot proceed until this step is completed. Understanding this concept is crucial in process management and optimization, as identifying and addressing bottlenecks can lead to significant improvements in efficiency and productivity.

In contrast, the other options do not accurately represent a bottleneck. The fastest step in the workflow would enhance the process rather than limit it. While methods for increasing efficiency might help alleviate bottlenecks, they do not define what a bottleneck is. Lastly, describing the complete process from start to finish encompasses all steps and does not highlight the limiting factor that a bottleneck signifies.