D6 (Implement and Validate Permanent Corrective Actions)

8D discipline focused on full-scale implementation of verified PCAs and confirming they work in production over time. Includes updating work instructions, training, control plans, and FMEAs. Validation requires data collection over sufficient time period (weeks to months) to prove effectiveness. Interim Containment Actions (D3) can only be removed after D6 validation proves the permanent solution is working. Similar to A3 Implementation & Follow-up but with more rigorous validation requirements.