What is PPAP and what are its key elements in automotive manufacturing?

PPAP (Production Part Approval Process) demonstrates that a supplier can consistently manufacture parts meeting customer requirements. Key elements (18 items) include: Design records, engineering change documents, customer engineering approval, design FMEA, process flow diagram, process FMEA, control plan, MSA (measurement system analysis), dimensional results, material/performance test results, initial process studies, qualified laboratory documentation, appearance approval, sample parts, master sample, checking aids, customer-specific requirements, and part submission warrant (PSW). PPAP submission levels (1-5) define required documentation. Approval is required before production shipments and for any significant changes.