Goldratt's Theory of Constraints

A tool for optimizing business processes, invented by Goldratt in the late 70s, early 80s of the 20th century.   

The essence of the approach is to find the point of growth - the process that determines the efficiency of the entire operation. Then, you need to focus on improving that process. At the same time, it is important not to forget about the remaining processes, they should not start to work worse. Once the process has been improved, you should move on to finding a new point of growth.

This approach allows you to save resources and achieve your goals with less effort.