PCA (Permanent Corrective Action)

Root cause-based solution implemented in 8D methodology (D5 step) that eliminates the problem permanently, as opposed to Interim Containment Actions that only protect customers temporarily. PCA must address verified root causes from D4 analysis and be validated through testing before full implementation. Similar to A3 Countermeasures but with explicit emphasis on permanence and verification. Not considered complete until proven effective through data collection in D6.