PPAP stands for Production Part Approval Process. It is the automotive industry's method for proving that a supplier's production process can make a part that meets every requirement, consistently, at the planned rate. The process is set out in the AIAG PPAP manual, and many non-automotive buyers have adopted it too.
Many Indian auto-component exporters follow PPAP as routine, especially those certified to IATF 16949. Smaller general engineering workshops often do not, though some will learn if you guide them.
What a PPAP shows
A PPAP is a set of documents and samples submitted to the buyer before full production. The core idea is that the parts are made with production tooling, at production rate, by production staff. A typical package includes:
- Design records, such as the drawing and any engineering change documents.
- A full dimensional report on sample parts, with measured values for every feature.
- Material and performance test results from recognised laboratories.
- A process flow diagram, a process FMEA and a control plan.
- Measurement system analysis showing the gauges are fit for purpose.
- Initial process studies, such as Cpk values for critical characteristics.
- A Part Submission Warrant, signed by the supplier, summarising the submission.
Submission levels
PPAP has five submission levels, from a warrant alone to a full package reviewed at the supplier's site. The buyer chooses the level. The levels are explained in detail in PPAP submission levels.
Indian suppliers in practice
Suppliers to vehicle makers in India and abroad know PPAP well. Their quality teams produce control plans and FMEAs as standard. If your part is automotive, ask for a recent PPAP made for another customer, with names removed, to see the quality of their work.
General engineering shops making pumps, valves or machine parts may never have made a PPAP. If you need one, say so before you order and budget time for it. The first PPAP from a new supplier often needs several rounds of correction.
Be wary of paperwork produced to order. A control plan that looks perfect but does not match what happens on the shop floor is worse than none. Check that the documents describe real processes, real gauges and real inspection frequencies.
A simple test is to pick one line of the control plan and ask to see it in action. If the plan says a bore is checked every 25 parts with a plug gauge, the gauge should be at the machine and the check sheet should be filled in.
Do you need full PPAP?
Not always. For low-risk industrial parts, a first article inspection plus material certificates may be enough. Use PPAP when your customer requires it, when the part is safety-critical, or when you need proof that quality will hold over large volumes.
Next step
We check whether a supplier can deliver the PPAP you need and review the documents against the shop floor. Book a free sourcing review.