Elements of the PPAP

A PPAP consists of multiple interrelated elements, and because the process can become highly detailed, it is often best to focus first on the expected outcome and work backwards. This approach helps ensure that all required evidence is gathered logically and efficiently.

When compiled together, these documents form what is known as the PPAP Package. This package must be formally reviewed and approved, as it demonstrates that the supplier’s process is capable, controlled, and aligned with customer requirements.

Part Submission Warrant (PSW)

The Part Submission Warrant (PSW) is the summary document of the entire PPAP package. It serves as a formal declaration that all required elements have been completed, reviewed, and validated.

Approval of the PSW confirms that the supplier’s responsible authority—typically a Quality Engineer or equivalent—has verified the PPAP documentation and that the customer has not identified any issues that would prevent approval or production release.

PPAP within the APQP framework

PPAP is one of several key tools within the Advanced Product Quality Planning (APQP) framework. It is used during the design and development of new vehicles, components, and systems to reduce the risk of unexpected failures caused by design flaws, process weaknesses, or manufacturing variation.

While PPAP validates readiness for production, it relies on earlier APQP activities to ensure risks are identified and mitigated as early as possible.

Standards and customer-specific requirements

The PPAP manual, published by the Automotive Industry Action Group (AIAG), defines the generic requirements for obtaining PPAP approval and provides guidance on required documentation and submission levels.

In addition to AIAG requirements, suppliers must also comply with customer-specific requirements, which may vary by OEM or manufacturer. These requirements are typically published on customer supplier portals or referenced through the International Automotive Task Force (IATF).

Failure to meet customer-specific requirements can result in rejected submissions or delayed approvals, even when the core PPAP elements are complete.