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Pareto Chart—7QC Tool
What Question(s) Does the Tool or Technique Answer?
What are the vital few items with the biggest impact? Which 20% of items produce 80% of the impact (the 80/20 rule)?
A Pareto chart helps you to
• Prioritize and select the biggest problem areas or largest areas of opportunities
• Analyze the frequency of an event (occurrences or number of items) in a process and identify the biggest contributors
• Communicate a snapshot summary of how 80% of the problem comes from 20% of the causes
Alternative Names and Variations
• This tool is also known as a Pareto diagram
• Variations on the tool include Weighted Pareto Analysis
When Best to Use the Tool or Technique
A Pareto chart is a tool to focus attention on priorities when ...
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