The Pareto Principle states that "not all of the causes of a particular phenomenon occur with the same frequency
or with the same impact". The Pareto chart is designed to graphically display this principle.
A Pareto chart is a histogram in which the categories are sorted by occurrence in decreasing order, to which is added
a percent cumulative frequency curve.
A Pareto Chart Showing the Factor Categories Behind 80% of a Given Product Defect