skip to Main Content

Pareto Chart -

A Pareto Chart is a bar chart of discrete data that displays the most significant categories of defects in descending order. The chart was named after the Italian economist, Vilfredo Pareto, who discovered the “80/20 Rule.” The Pareto Chart uses the “80/20 Rule” to narrow the focus of process improvement to the 20% of defect categories causing 80% of the process issues.

Pareto Charts display both frequency of occurrences (bar graph) and cumulative percent of occurrences (line graph) on a single chart. The left Y-Axis shows frequency of occurrences, while the right Y-Axis shows the total percentage.

Pareto Chart Template

For a better understanding of the Pareto Chart and an overview of Lean Six Sigma, check out our Free Lean Six Sigma Yellow Belt Training, Green Belt Training or Lean Training.