Improving the performance of a constraint in a job shop environment will:

According to the Theory of Constraints (TOC), improving the bottleneck (constraint) in a process directly improves throughput, because the constraint is the limiting factor for the entire system. Other benefits such as WIP reduction follow, but throughput is the first measurable gain.

“Increasing the performance of the bottleneck increases overall system throughput.”

— CPIM ECO Module; Theory of Constraints (TOC) Section