The automotive industry demands exceptional quality standards due to the safety-critical nature of vehicle components. IATF 16949 (formerly TS 16949) and Production Part Approval Process (PPAP) form the backbone of automotive quality management. This guide explains inspection requirements for automotive suppliers.
IATF 16949 Core Requirements
IATF 16949 builds on ISO 9001 with automotive-specific additions:
• Context of the Organization: Understanding stakeholder requirements including CSR (Customer Specific Requirements)
• Risk-Based Thinking: FMEA (Failure Mode and Effects Analysis) for all processes
• Product Safety: Identification of safety characteristics and special controls
• Embedded Software: Software process assessment and capability evaluation
• Traceability: Lot traceability throughout the supply chain
Production Part Approval Process (PPAP)
PPAP has 5 submission levels with 18 required elements:
1. Design Records
2. Authorized Engineering Change Documents
3. Customer Engineering Approval
4. Design FMEA
5. Process Flow Diagram
6. Process FMEA
7. Control Plan
8. Measurement System Analysis (MSA)
9. Dimensional Results
10. Material and Performance Test Results
11. Initial Process Studies (Ppk ≥ 1.67)
12. Qualified Laboratory Documentation
13. Appearance Approval Report (AAR)
14. Sample Production Parts
15. Master Sample
16. Checking Aids
17. Customer-Specific Requirements
18. Part Submission Warrant (PSW)
Critical Characteristics Inspection
Automotive parts often have Critical (CC), Significant (SC), and Major (MC) characteristics:
• CC (Critical Characteristic): Affects compliance with government regulations or safe vehicle operation. Requires 100% inspection or SPC with Cpk ≥ 1.67.
• SC (Significant Characteristic): Affects customer satisfaction through fit, function, or appearance. Requires SPC monitoring.
• MC (Major Characteristic): Important for product performance. Standard inspection protocols apply.
Advanced Product Quality Planning (APQP)
APQP is the structured method for product and process design:
• Plan and Define Program: Voice of customer, design goals, reliability goals
• Product Design and Development: DFMEA, design verification, prototype control plan
• Process Design and Development: PFMEA, pre-launch control plan, process validation
• Product and Process Validation: Production trial runs, PPAP submission
• Feedback, Assessment, and Corrective Action: Continuous improvement, lessons learned