We have already covered two ways the Pareto Charts help find the defects that have the most cumulative effect.įirst, the first bars are always the tallest, indicating the most common sources of defects. The idea behind a Pareto Chart is that the few most significant defects make up most of the overall problem. ![]() When the cumulative percentage line starts to flatten, the types of defects do not deserve as much attention since solving them will not influence the outcome as much.ĥ) A Pareto Chart is a quality tool: it helps analyze and prioritize issue resolution. Therefore, it is worth finding the cause of these types of defects and solving them. In any Pareto Chart, for as long as the cumulative percentage line is steep, the types of defects have a significant cumulative effect. In the example above, solving just the two most important types of defects - Button Defects and Pocket Defects – will remove 66% of all defects. The last cumulative percentage will always be 100%.Ĭumulative percentages indicate what percentage of all defects can be removed if the most important types of defects are solved. In this case, this would be the sum of the percentages of Button Defects, Pocket Defects, and Collar Defects (39% + 27.1% + 16.9%). ![]() ![]() The Cumulative % corresponds to the sum of all percentages previous to and including Collar Defects. For Collar Defects, the % of Total is simply (10/59)*100.
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