What is Pareto Chart ?

The Pareto Chart is one of the ‘Seven Basic Tools of Quality Control.’ It helps highlight the most important factors from among a group of many factors. In quality control, it is often used to represent the most common sources of defects or the highest occurrence of defects. It is a simple bar chart that displays the number of occurrences on the left vertical axis and the category of occurrences on the horizontal axis. While not required, you can add a right vertical axis which represents the cumulative percentage of the left axis to the total.

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