ISO 9001 asks: "Do you have a system?" VDA 6.3 asks: "Does your process actually work?" It is not a documentation check. It is a forensic examination of whether your operation delivers what it promises.
I have implemented and transitioned quality systems at a major aerospace manufacturer, SNOP and WITTE Automotive. I have also walked into supplier plants where the quality manager resigned three weeks before a mandatory VDA audit, leaving records in chaos and operators unclear on their own control plans. You cannot cram for a VDA audit overnight. You have to fix the process.
The 2016 methodology (updated in 2023) streamlines the evaluation, but the core remains unchanged: a systematic investigation that forces the process to tell the truth.
The Seven Process Elements
VDA 6.3 breaks the audit into seven process elements (P-elements). Each examines a different dimension of the product lifecycle.
P1 through P4: Concept to Validation
P1 (Potential Analysis) is a rapid 11-question assessment used during supplier selection. It tells you if a vendor has the baseline maturity to meet requirements.
P2 (Project Management) examines resource allocation, milestones, and risk. If your project plan is a spreadsheet untouched for three months, P2 will expose it in minutes.
P3 (Product and Process Planning) is where preparation meets detail. It demands current PFMEA documents, control plans, and flow charts. If you do not know your critical characteristics here, you will fail later.
P4 (Product and Process Realisation) is the moment of truth. It verifies that prototypes passed validation and PPAP requirements were met. It checks if the paper vision survived contact with the production floor.
P5 through P7: Supply Chain to Customer
P5 (Supplier Management) proves your process is only as good as your inputs. It forces you to distinguish between a vendor supplying 1,000 parts a year and one supplying a million.
P6 (Process Analysis) is the core of the audit. It is broken down into seven sub-elements covering inputs, process behaviour, personnel, equipment, efficiency, outputs, and transport. This is where auditors check mix-up protection, OEE, and Cpk targets directly on the line.
P7 (Customer Satisfaction) closes the loop. It reviews complaint levels, reaction times, and how feedback drives actual improvement.
Scoring and Classification
VDA 6.3 uses a 10-point scale per question, converted into a percentage for each chapter. The overall score determines your classification.
| Overall Score | Classification | Consequence |
|---|---|---|
| ≥ 90% | Class A | Compliant |
| 75–89% | Class B | Conditionally compliant |
| < 75% | Class C | Non-compliant; immediate action required |
The Reality Gap on the Shop Floor
When I took over a struggling supplier plant, I found a PFMEA copied from a previous project without a single updated value. The control plan on the line was three years old. Operators did not know the critical characteristics of the product. Calibration records were six months overdue.
Fixing this in three weeks required stripping away the paper and fixing the process. We rebuilt the PFMEA with the operators present—the people on the line knew more about failure modes than the engineers. We scrapped the old control plan and made every parameter live, with a named owner, frequency, and reaction plan.
The Documentation Trap
What teams do
- Generate PFMEA from previous projects to save time
- Hang outdated control plans at the workstation
- Rely on classroom training and sign-off sheets
- React to out-of-spec parameters by adjusting targets
What works
- Update PFMEA with input from actual line operators
- Maintain living control plans with clear reaction steps
- Conduct 20-minute targeted briefings directly at the station
- Enforce defined reaction plans and document deviations
We implemented visual management, Andon signals, and colour-coding. The result was 87% (Class B). More importantly, the operators understood why the controls existed.
Avoiding the Standard Pitfalls
After 20 years in quality engineering, the same failures surface in VDA audits. Last-minute preparation is fatal. If you start preparing a month before the audit, you are already too late. VDA 6.3 evaluates the standard of your daily operations.
Another critical failure is ignoring findings from previous audits. An open finding from a past audit is an immediate red flag for any external auditor.
If your internal audits never find any issues, the process is not perfect; your audit system is broken.
Formalistic internal LPA (Layered Process Audits) are a liability. VDA 6.3 expects your internal system to identify real problems. Zero findings mean a non-functional audit system, not a flawless operation.
Execution: How to Actually Prepare
Preparation is not a solo performance by the quality department. It requires a cross-functional team: production, maintenance, logistics, and procurement. Build a team of representatives from all key functions.
Run an internal pre-audit using the exact VDA 6.3 questionnaire. Be as strict as an external auditor. It is always better to find the gap internally.
Go to the Gemba. Talk to operators. Verify the documented standard. If the control plan says "check every 2 hours" and the operator says "I check when I have time," you have a severe nonconformance.
VDA 6.3 Preparation Sequence
- 01Internal Pre-AuditExecute the exact VDA questionnaire with cross-functional leads.
- 02Gemba VerificationWalk the line to confirm documented standards match operator reality.
- 03Gap ClosureAddress specific findings from the pre-audit and past external audits.
- 04Reaction Plan CheckVerify every control plan parameter has a live, documented response.
Finally, ensure your reaction plans are actionable. A control plan without a reaction plan is a fire extinguisher without propellant. Every parameter needs a clear, documented response for when it goes out of specification.
System Compatibility and Future Shifts
If you operate in automotive, you need both ISO 9001 and VDA 6.3. ISO 9001 provides the foundational management system. VDA 6.3 provides the deep-dive validation. The 2023 update increases the focus on software integration, traceability, and supply chain resilience.
The best preparation for a VDA audit is a quality system that functions seamlessly every shift. Do not start by updating documents. Start on the shop floor, look at your process critically, and fix what is broken before the customer finds it.