2, 5, 7 or 14 Lean principles?

What are the true Lean principles?


What are the Lean principles?
Between those of the "TPS house", "Lean Thinking", "Toyota Way 2001", and "The Toyota Way: 14 Management Principles from the World's Greatest Manufacturer", to name only the most popular, which ones should we remember?
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Lean management history

Lean management history
Lean management was neither created in a day, nor only at Toyota. Here is a history of Lean management and how it has evolved from Henry Ford to today.

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