PPAP has five submission levels, and the difference between Level 1 and Level 5 is the difference between one signed form and opening your entire documentation file to an on-site review. The 18 elements, the five levels, and where submissions actually go wrong.
Not every part needs the same paperwork before it ships. PPAP has
five submission levels, and the difference between Level 1 and Level 5
is the difference between handing a customer one signed form and
opening your entire documentation file to an on-site review.
The Production Part Approval Process (PPAP) is an AIAG (Automotive
Industry Action Group) standard that formally proves a supplier’s
production process can consistently make parts that meet all engineering
and specification requirements — at full production rate, not just in a
lab sample. It’s one of the “core tools” required under IATF 16949, and
it sits downstream of APQP: APQP plans the launch, PPAP proves the
process actually works before mass production starts.
A complete PPAP package covers 18 documented elements, including
design records, engineering change documents, process flow diagrams,
a Failure Mode and Effects Analysis, a control plan, measurement system
analysis studies, dimensional results, material and performance test
results, and initial process studies. The specific combination of
elements a customer requires depends on the submission level requested
and the part’s risk profile.
| Level | What’s submitted |
|---|---|
| Level 1 | Part Submission Warrant (PSW) only, to the customer |
| Level 2 | PSW plus product samples and limited supporting data |
| Level 3 | PSW with complete supporting data and samples — the most common default level |
| Level 4 | PSW plus other requirements as defined specifically by the customer |
| Level 5 | PSW with complete supporting data reviewable on-site at the supplier’s facility |
Level 3 is the default most customers request unless they specify
otherwise — Level 5 is reserved for higher-risk parts or suppliers with
a track record that warrants closer scrutiny.
The most common failure isn’t missing paperwork — it’s a mismatch
between what the PPAP package claims and what the process actually does
at full production rate. A part submitted using pilot-run samples,
measured under ideal conditions, can pass PPAP and then fail to hold
tolerance once real production speed, tooling wear, and operator
variation enter the picture. Customers that catch this discrepancy
during a later audit treat it as a serious trust issue, not a paperwork
correction.
PPAP itself isn’t a standalone course in SCMEP’s current catalog —
it’s one of the automotive core tools that sits on top of the quality
fundamentals covered in our ISO 9001:2015
Overview. As a NIST Manufacturing Extension
Partnership affiliate serving South Carolina manufacturers since
1989, our focus is connecting the supply-chain compliance work PPAP
requires to the broader quality system it depends on.
If your team is preparing PPAP submissions for an automotive
customer, you can browse the
Supply Chain and Sustainability training catalog or email
the training
team.
PPAP is the final exam; APQP is the planning process leading up to
it. See our related guide on APQP
for the five phases that should happen before a PPAP submission is
ever assembled.
The Production Part Approval Process is an AIAG standard that proves a supplier’s production process can consistently make parts meeting all engineering and specification requirements at full production rate. It’s one of five required “core tools” under IATF 16949.
A complete PPAP package covers 18 documented elements, including design records, process flow diagrams, FMEA, control plan, measurement system analysis, and dimensional and test results.
There are 5 levels, ranging from Level 1 (Part Submission Warrant only) to Level 5 (full documentation reviewable on-site at the supplier). Level 3, which includes complete supporting data and samples, is the most common default.
Submitting a package based on pilot-run or ideal-condition samples that doesn’t reflect what the process actually produces at full production rate, where real-world variation, tooling wear, and operator differences can push parts out of tolerance.
