Pareto chart

Pareto chart
One of the Seven Basic Tools of Quality
Purpose	To assess the most frequently occurring defects by category†

A Pareto chart is a type of chart that contains both bars and a line graph, where individual values are represented in descending order by bars, and the cumulative total is represented by the line. The chart is named for the Pareto principle, which, in turn, derives its name from Vilfredo Pareto, a noted Italian economist.