Six Sigma SPC - Statistical Process Control

Six Sigma SPC's Quality Control Dictionary and Glossary
2070 W. Washington St. #5 Springfield IL 62702  Ph: 217.698.0063
6 Sigma Statistical Process Control (SPC) Software for Windows 95/98/NT/2000/XP/ME


Home Search Capability Studies Links

Click Here!

Prices FAQ
About Support
Contact Quality Control Dictionary and Glossary Free Desktop 6 Sigma Calculator Forum
Quality Books Articles Free Online 6 Sigma Calculator Free Newsletter

Pareto Chart or Juran Diagram

A quality tool, also called a Juran diagram, that is based the Pareto Principle, which uses attribute or discrete data with the data arranged in descending order, and with the most occurrences shown first. May use a cumulative line to mark percentages for each group or bar, which distinguishes the Pareto Principal or the 80/20 rules that states 20 percent of items will cause 80 percent of the problems.

The example below is from the Dale H. Besterfield, Ph.D. book, Quality Control Sixth Edition, that includes a CD of Excel macros.

Paint Nonconformities



Freq. Percent Cumulative %
2 Lt. Spray 582 30.9 30.9
7 Runs 434 23.1 54.0
3 Drips 227 12.1 66.1
1 Blister  212 11.3 77.4
5 Splatter 141 7.5 84.8
6 Bad Paint 126 6.7 91.5
4 Overspray 109 5.8 97.3
8 Other 50 2.7 100.0
Pareto Chart Example

Back to the Quality Control Dictionary and Glossary

Click Here!

Copyright � 2005 Six Sigma SPC / Jim Winings All Rights Reserved
Privacy Statement - Disclaimer - Copyright - Site Map

Last Updated: Saturday, 01-Apr-06 01:21:41 PST