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 |
|
| Number |
Category |
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 |
