An 8D report is a structured, eight-discipline problem-solving document used across quality engineering. This guide explains what it is, when to use it, and each discipline from D0 to D8.
What is an 8D report?
The 8D report summarizes a team-based problem-solving investigation across eight disciplines: plan and prepare (D0), team (D1), problem description (D2), containment (D3), root cause (D4), permanent corrective action (D5), implementation (D6), prevention (D7) and closure (D8). It is widely required by automotive OEMs and aligned with IATF 16949 corrective-action requirements.
D0–D8 at a glance
D0 — Prepare
Assess urgency and take emergency response actions to protect the customer.
D1 — Team
Form a cross-functional team with a leader, sponsor and subject experts.
D2 — Describe
Write a precise, data-driven problem statement using 5W2H.
D3 — Contain
Implement interim containment and quarantine suspect stock.
D4 — Root cause
Find technical and systemic root cause plus the escape point.
D5 — Verify
Verify the permanent corrective action before full deployment.
D6 — Implement
Roll out the corrective action and validate it in production.
D7 — Prevent
Update FMEA and control plans; deploy lessons learned horizontally.
D8 — Close
Recognize the team and formally close the report with lessons learned.
When to use it
A customer or OEM demands a formal corrective-action report.
A safety-related or field failure requires a cross-functional investigation.
The same defect keeps recurring across shifts, lines or suppliers.
Your quality management system requires documented root cause analysis (IATF 16949, ISO 9001).
