Quotes in data

When you see data, doubt [them]! When you see measurements, doubt them!


All Models Are Wrong But Some Are Useful

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In the spirit of science, there really is no such thing as a "failed experiment." Any test that yields valid data is a valid test.

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Half the money I spend on advertising is wasted; the trouble is I don't know which half.


Quality, productivity, and innovation can be significantly increased if companies provide all employees with practical tools for exploiting potential information


In a world without data, opinion prevails.


People who can't understand numbers are useless. The gemba where numbers are not visible is also bad. However, people who only look at the numbers are the worst of all.

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Management must provide employees with tools that will enable them to do their jobs better, and with encouragement to use these tools. In particular, they must collect data.

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The only way to find out what will happen when a complex system is disturbed is to disturb the system, not merely to observe it passively.

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Statisticians, like artists, have the bad habit of falling in love with their models.

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