[reval]

Snark aside, this is the main topic of Eli Goldratt's "The Goal" - one of my favourite books. Output of the business is constrained by some bottleneck. Improving efficiency away from the bottleneck is just waste. Said differently, enhancing individual productivity has no effect on the business output unless doing so elevates the bottleneck. Sadly, most business don't know what their constraints are or are otherwise blocked from elevating them due to politics and other factors.