PPAP (Production Part Approval Process)

PPAP (Production Part Approval Process) is a structured method used primarily in automotive and other discrete manufacturing to demonstrate that a supplier’s production process can consistently produce parts that meet all specified requirements at the quoted production rate. It is part of the APQP (Advanced Product Quality Planning) framework and is widely referenced in automotive and transportation supply chains, as well as in adjacent regulated industries.

What PPAP includes

PPAP commonly refers to both:

• The approval process itself, in which a customer (often an OEM or Tier 1) reviews and approves submitted evidence before authorizing production shipments.
• The compiled submission package (PPAP package), which contains the documented evidence that the part and process meet requirements.

A typical PPAP package includes a defined set of elements, such as:

• Design records and any authorized engineering changes
• DFMEA/PFMEA and control plan
• Process flow diagram
• Dimensional results and material / performance test results
• Measurement system analysis (e.g., gage R&R)
• Initial process capability studies for key or critical characteristics
• Sample parts and supporting appearance or functional reports where applicable
• Records of qualified production tooling and any special process approvals

In operational terms, PPAP is often triggered by events such as new part introduction, design change, supplier change, or significant process changes (equipment, location, tooling or method). The PPAP approval status then controls whether a part may ship as production, as interim/limited approval, or not at all.

How PPAP shows up in manufacturing systems

In industrial and regulated environments, PPAP requirements typically interact with MES, ERP, PLM and QMS workflows. Examples include:

• Linking PPAP submissions to specific part numbers, revisions and BOMs in PLM/ERP.
• Using MES or quality systems to capture inspection data, capability indices and traceability records required in the PPAP package.
• Driving supplier status, incoming inspection level and release decisions based on PPAP approval state.
• Storing PPAP documentation under document control, with version governance and audit trails for future reference.

For suppliers, PPAP often defines the evidence needed to demonstrate process readiness and capability to key customers. For customers, it provides a structured way to review and approve supplier processes before relying on them for serial production.

Common confusion

• PPAP vs. FAI (First Article Inspection): FAI, as in AS9102, focuses on verifying that one or more initial production pieces meet design and drawing requirements. PPAP includes dimensional and test data but also covers process planning, capability, measurement systems and control plans. FAI can be one input to a PPAP but is not a full PPAP by itself.
• PPAP vs. APQP: APQP is the broader product and process development framework. PPAP is one defined output of APQP that provides formal customer approval for production parts.
• PPAP vs. routine inspection: Routine inspection is ongoing quality control during production. PPAP is usually a one-time or event-driven approval activity, although resubmission can be required when key changes occur.

Use in regulated and adjacent industries

While PPAP originated in automotive, similar structured approval processes are now used in other sectors, including aerospace, heavy equipment and medical-adjacent manufacturing. Organizations may adopt PPAP, or PPAP-like requirements, to standardize supplier onboarding and change control for production parts, especially where traceability, documentation and process capability evidence are important.