Below is a summary of the typical results achieved with Theory of Constraints. If you are looking for success stories, see our articles page.
Archimedes

Focus & Leverage
Covey: “…anything less than a conscious commitment to the important is an unconscious commitment to the unimportant."
Archimedes: “If I can find a lever long enough and a place to stand, I can move the world!"
Eliyahu M Goldratt: Theory of Constraints uses both of these concepts, just read The Goal!