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Here are the key steps :
1. Find a change agent
2. Get the lean knowledge
3. Find or create a crisis
4. Forget grand strategy for the moment
5. Map the value streams
6. Begin as soon as possible
7. Demand immediate results
8. As soon you have got momentum expand your
scope.
For beginners seeking an overview of the entire lean system, as well as a sense of the types of human challenges which lean leader encounter.
( Jim Womack with the workbook " Lean Thinking " ).