Performance Improvement History in Formulas

A very Lean history of Process Improvement, with key milestones from ancient times – to our days. Feel free to correct the math or add another milestone.
Come back soon to know what comes next, after Lean and Agile.
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Read more about this:
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“Lean” is to Businesses as “Weight Watchers” is to Individuals
“LEAN all over the place. But It Does Not Work.”
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What Do Starbucks and Lean Six Sigma Have In Common?