"In the 1980s, this plant was the beneficiary of three incredible scientifically-grounded management movements. You've probably heard of them: the Theory of Constraints, Lean production or the Toyota Production System, and Total Quality Management. Although each movement started in different places, they all agree on one thing: wip is the silent killer. Therefore, one of the most critical mechanisms in the management of any plant is job and materials release. Without it, you can't control wip."