Pareto tool online

Typically on the left vertical axis is frequency of occurrence, but it can alternatively represent cost or other important unit of measure. The right vertical axis is the cumulative percentage of the total number of occurrences, total cost, or total of the particular unit of measure. The purpose is to highlight the most important among a (typically large) set of factors.

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Their use gives rise to the 80-20 Rule that 80 percent of the problems stem from 20 percent of the causes.
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