QEHSQuality
Pareto Analysis
The 80/20 rule applied to quality defects — 80% of problems from 20% of causes.
Pareto analysis ranks defect categories by frequency or cost, cumulating until 80% of the total is explained. The resulting Pareto chart (bar + cumulative line) shows which few causes account for most defects, directing corrective action effort. A standard tool in Six Sigma DMAIC and ISO 9001 continual improvement cycles.