Seven Quality Tools

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There are seven basic quality improvement tools that are used by Quality Circle teams, and are fundamental to the Total Quality Management, Total Quality Control, Lean, and Six Sigma initiatives.

  • Cause-and-effect diagrams (sometimes called Ishikawa diagrams, or C&E diagrams, or “fishbone” diagrams)
  • Pareto charts
  • Process mapping and data gathering tools:
    • check sheets
  • Graphical tools:
    • histograms
    • frequency diagrams
    • spot charts
    • pie charts
  • Run charts and control charts
  • Scatter plots and correlation analysis
  • Flowcharts

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