What I learned from "The Goal" is that any business/system will always have a single bottleneck that dictates the max throughput of the whole business/system.

What I learned from "The Goal" is that any business/system will always have a single bottleneck that dictates the max throughput of the whole business/system. So as a manager it is your #1 objective to find that bottleneck and remove it. And the moment you remove it, the max throughput of the whole business/system improves until some other bottleneck is now limiting throughput. So you repeat finding and fixing that bottleneck etc. There are of course different ways to fix the bottleneck. Kanban is a famous example of one. However even with Kanban the business will still have a bottleneck that limits throughput.