Quality Improvement Pareto Chart Example
A pareto chart graphically illustrates the 80/20 principle. This is where, for example, 20% of the causes explain 80% of the consequences.
The following example below is from the quality improvement area. See below graph for explanation.
As you can see two of the five problems (40%) account for about 80% of the problems. Sometimes the 80/20 rule does not add up to 100%. In this case it is 120%. Often it can be 70/30 or 90/40 or whatever. the ratio really indicates that things in this world are skewed, that
- the majority has little impact but
- the minority has major impact
Notice how the 80% cumulative level cuts the red line roughly at the second problem column (40% of the Problems).
This chart was made Microsoft Excel.
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