The 20/80 Law: 20 Percent Of The Customers Account For 80 Percent Of The Turnover, 20 Percent Of The Components Account For 80 Percent Of The Cost, And So Forth.

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The 20/80 Law: 20 percent of the customers account for 80 percent
of the turnover, 20 percent of the components account for 80 percent
of the cost, and so forth.
-- Vilfredo Pareto

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