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What metrics matter: A guide for open source projects

“Without data, you’re just a person with an opinion.”

Those are the words of W. Edwards Deming, the champion of statistical process control, who was credited as one of the inspirations for what became known as the Japanese post-war economic miracle of 1950 to 1960. Ironically, Japanese manufacturers like Toyota were far more receptive to Deming’s ideas than General Motors and Ford were.

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