VDA 6.3 Process Audit for Automotive Supplier Quality

In the automotive industry, and among Tier 1, Tier 2 and Tier 3 suppliers, quality is no longer limited to having a compliant documentation system.It is assessed on the shop floor, through the real and effective control of processes.

This is precisely the purpose of the VDA 6.3 process audit, which has become a key standard for automotive supplier audits and production audits worldwide.

Developed by the German Association of the Automotive Industry (VDA), VDA 6.3 is now a major reference for evaluating an organisation’s ability to manufacture products in a reliable, repeatable and customer-compliant way.

What Is the VDA 6.3 Process Audit?

VDA 6.3 is a process audit standard mainly used in the automotive industry.Unlike system audits such as ISO 9001 or IATF 16949, it does not focus on the existence of procedures, but on their practical implementation in daily operations.

A VDA 6.3 audit verifies whether processes:

• are clearly defined,

• are effectively controlled,

• deliver the expected results,

• and allow early identification of quality and process risks.

It is frequently required by automotive OEMs and suppliers, particularly in international and German-speaking environments.

VDA 6.3 vs System Audits: Key Differences

The Specific Approach of the VDA 6.3 Process Audit

The VDA 6.3 process audit analyses what actually happens within the organisation:

• during product and process development,

• in production,

• in logistics,

• and in the management of non-conformities.

Customer requirements are directly compared with real shop-floor practices.Observed deviations often reveal structural weaknesses that remain invisible during purely documentation-based audits.

VDA 6.3 Structure: Modules P1 to P7

The VDA 6.3 framework is structured into several process elements, known as modules P1 to P7.

P1: Supplier Potential Analysis

Module P1 assesses a supplier’s ability to meet requirements before project launch. It plays a critical role during supplier selection, sourcing and supplier approval phases.

P2 to P4: Product and Process Development

Modules P2 to P4 focus on:

• project management,

• consideration of customer requirements,

• product design and development,

• development of production equipment and manufacturing processes.

They are essential to secure early project phases and prevent deviations during series production.

P5 to P7: Production, Logistics and Continuous Improvement

Modules P5 to P7 address:

• series production,

• control of special processes,

• logistics and material flow,

• non-conformity management,

• continuous improvement activities.

This is often where operational and production-related risks are identified.

VDA 6.3 Scoring System and Audit Results

VDA 6.3 is based on a precise and structured scoring system.Each question is evaluated according to the observed level of process control.

The results make it possible to:

• identify process risks,

• objectively compare suppliers,

• define targeted action plans,

• decide on production start, reinforced monitoring or termination of cooperation.

A good audit score only has value if it reflects real and sustainable process control.

Why VDA 6.3 Is a Strategic Tool for Automotive Suppliers ?

Although often perceived as demanding, VDA 6.3 is in fact a powerful continuous improvement tool.

It highlights:

• human dependencies,

• informal practices,

• organisational weaknesses,

• unanticipated risks.

When used effectively, it strengthens quality performance, industrial efficiency and customer relationships.

The Role of an External VDA 6.3 Auditor

An effective VDA 6.3 audit relies on:

• a strong understanding of industrial environments,

• a detailed and structured analysis of processes,

• a pragmatic risk-based approach,

• a balanced posture combining requirements with support.

The objective is not to penalise, but to drive sustainable improvement within the audited organisation.

Conclusion: VDA 6.3 as a Global Quality Management Tool

The VDA 6.3 process audit is now an essential standard for automotive companies and their suppliers worldwide.When properly prepared and professionally supported, it becomes a true management tool for quality, processes and industrial performance.