If you supply German OEMs — Volkswagen, BMW, Mercedes, Bosch — VDA 6.3 process audits are not optional. Unlike IATF 16949 which certifies your system, VDA 6.3 audits your actual manufacturing processes. We explain the turtle diagram methodology, how to prepare for the P5-P7 production process audit, common findings that trip up suppliers, and how VDA 6.3 complements your IATF 16949 certification.
Understanding VDA 6.3
VDA 6.3 is the German automotive industry standard for process auditing, developed by the Verband der Automobilindustrie. While IATF 16949 provides the quality management system framework, VDA 6.3 provides a specific methodology for evaluating process capability and performance. If you supply to Volkswagen, BMW, Mercedes-Benz, or any German OEM, VDA 6.3 process audits are not optional — they are a fundamental part of supplier qualification and monitoring.
VDA 6.3 evaluates processes across the entire product lifecycle from project planning through series production and customer care. The standard uses a structured question catalog with defined evaluation criteria, producing a quantified compliance result that enables objective comparison across suppliers and processes.
The Question Catalog
VDA 6.3 organizes its process audit questions into seven process elements: P1 (Potential Analysis), P2 (Project Management), P3 (Product and Process Development Planning), P4 (Realization of Product and Process Development), P5 (Supplier Management), P6 (Process Analysis — Production), and P7 (Customer Care and Satisfaction). Each element contains specific questions rated on a 0 to 10 scale.
Process element P6 (Production) typically receives the most scrutiny during supplier audits. Questions cover personnel qualification, production equipment capability, transportation and handling, defect analysis, and process control. Understanding what each question evaluates and what evidence auditors expect is essential for achieving high compliance scores.
Scoring and Expectations
VDA 6.3 uses a percentage-based scoring system. Individual questions are rated 0, 4, 6, 8, or 10 points based on compliance level. These scores roll up to element-level percentages and an overall compliance percentage. German OEMs typically require minimum 80 percent overall with no individual element below 70 percent for supplier approval.
Scores below threshold trigger improvement requirements with defined timelines. Repeated failure to achieve minimum scores can result in new business holds or existing business phase-out. Understanding the scoring system helps you prioritize improvement efforts where they will have the greatest impact on your overall compliance rating.
Preparing for VDA 6.3 Audits
Preparation for VDA 6.3 audits requires understanding both the question catalog and the evaluation criteria for each rating level. A score of 10 means the requirement is fully implemented and effective. A score of 6 means partially implemented. A score of 0 means not implemented or not effective.
Conduct internal VDA 6.3 process audits before external customer audits. Use the actual VDA 6.3 question catalog and scoring methodology. Identify elements scoring below 80 percent and implement corrective actions before the customer audit. Exceleor helps automotive suppliers prepare specifically for VDA 6.3 audits with mock audits using the actual evaluation methodology.
