In Lean Thinking, Daniel Jones and James Womack outline five lean principles:23 1.Value: specify value from the point of view of the customer. 2.Value Stream: identify the value stream and all the steps in it, from concept to cash. 3.Flow: limit work in progress; stabilize flow; focus on lead time, throughput, and flow efficiency; alleviate impediments to flow. 4.Pull: move from a push-based system of work to a pull-based system of work; go at the capacity of the system of work and don’t over-produce. 5.Perfection: the relentless pursuit of perfection.
