12.10 Pareto charts.
Painting new auto bodies is a multistep process. There is an "electrocoat" that resists corrosion, a primer, a color coat, and a gloss coat. A quality study for one paint shop produced this breakdown of the primary problem type for those autos whose paint did not meet the manufacturer's standards:
| Problem | Percent |
| Electrocoat uneven-redone | 4 |
| Poor adherence of color to primer | 5 |
| Lack of clarity in color | 2 |
| "Orange peel" texture in color | 32 |
| "Orange peel" texture in gloss | 1 |
| Ripples in color coat | 28 |
| Ripples in gloss coat | 4 |
| Uneven color thickness | 19 |
| Uneven gloss thickness | 5 |
| Total | 100 |
Make a Pareto chart. Which stage of the painting process should we look at first?