How to Create a PPAP (Production Part Approval Process) Plan

The Problem: PPAP Submissions Fail When Elements Are Treated as a Checklist, Not a Project

PPAP rejections from automotive customers are expensive. A first-submission rejection means weeks of rework, re-testing, and re-submission — weeks that eat into your production launch timeline and put customer delivery commitments at risk. And the rejection is almost never because the parts don't work. It's because the documentation package was incomplete, the measurement system analysis wasn't done correctly, or the process capability data didn't meet the Cpk requirement.

The root cause is treating PPAP as a checklist to complete at the end of the NPI project rather than as a project within the project that runs in parallel with tooling, process development, and production validation. PPAP Level 3 submission requires 18 elements of documentation, each with specific content requirements. Several of them (dimensional results, material testing, process capability) require physical parts produced at full production rate on production tooling and equipment. You can't produce those parts until tooling is qualified. You can't run process capability until you have process stability. The sequencing has to be right.

A PPAP Gantt chart sequences all 18 elements, assigns owners, and builds in the dependencies so nothing is missing on submission day. gantt-chart.io lets you build the PPAP timeline and share it with your quality team and the customer so they can see when to expect the submission.

Prerequisites

PPAP submission level confirmed with customer (Level 1–5; Level 3 is most common)
Production tooling and equipment qualified and in place (PPAP parts must come from production tooling)
Customer engineering drawing and specification at the latest approved revision
Named PPAP coordinator (quality engineer or quality manager)
Approved supplier list for all significant materials in the part

PPAP Development Gantt Chart Template

Phase 1: Design Documentation (Weeks 1–3)

[ ] Element 1: Design Records — customer drawing at latest revision, all referenced specifications
[ ] Element 2: Authorized Engineering Change Documents — any approved deviations or ECOs documented
[ ] Element 3: Engineering Approval — customer engineering approval of any design changes (obtain from customer)
[ ] Element 4: Design FMEA — if design responsibility is shared, DFMEA from engineering team
[ ] Confirm drawing and specification revisions with customer before any measurement or testing begins
[ ] Verify that all referenced sub-tier drawings and specs are included in the design record package

Phase 2: Process Documentation (Weeks 2–5)

[ ] Element 5: Process Flow Diagram — process flow from raw material receipt through shipping
[ ] Element 6: Process FMEA — failure modes for each process step, RPN, and controls
[ ] Element 7: Control Plan — pre-launch and production control plans with all inspection points and methods
[ ] Element 8: Measurement System Analysis (MSA) — Gage R&R for all measurement systems used in production inspection
[ ] MSA studies require actual production gauges and operators — plan lab time for this
[ ] PFMEA and Control Plan reviewed and aligned — detection and prevention controls should be consistent

Phase 3: Part Production Run (Weeks 6–8)

[ ] Significant Production Run: produce minimum 300 consecutive parts at production rate on production tooling
[ ] Document all process parameters during the run: machine settings, operator, date, shift
[ ] Element 9: Dimensional Results — measure a sample from the run (typically 5–30 parts per AIAG guidance) for all drawing dimensions
[ ] Element 10: Records of Material/Performance Tests — material certifications and functional test results from production run parts
[ ] Element 11: Initial Process Studies — capability study (Cp, Cpk) on all special characteristics
[ ] Cpk ≥ 1.67 for new processes; existing processes typically require Cpk ≥ 1.33
[ ] Statistical software used to calculate and document capability results

Phase 4: Supplier and Material Documentation (Weeks 4–7)

[ ] Element 12: Qualified Laboratory Documentation — lab accreditation certificates for any third-party testing
[ ] Element 13: Appearance Approval Report — for appearance-critical parts, obtain customer appearance engineer sign-off
[ ] Element 14: Sample Production Parts — retain and label production run samples per customer requirements
[ ] Sub-supplier PPAP: for all significant raw materials and purchased components, obtain PSW from sub-tier suppliers
[ ] Material certifications collected from all suppliers: material chemistry, mechanical properties per spec
[ ] Confirm whether customer requires sub-supplier PPAP at Level 3 or just material certs

Phase 5: Safety and Regulatory Documentation (Weeks 5–7)

[ ] Element 15: Checking Aids — calibration records and drawings for all inspection fixtures and gauges
[ ] Element 16: Customer-Specific Requirements — review customer's specific PPAP requirements document; address any additions
[ ] IMDS submission: International Material Data System submission for all materials (required for automotive)
[ ] REACH/RoHS compliance confirmation for all materials if applicable
[ ] Regulatory compliance documentation: any applicable standard compliance confirmed and documented

Phase 6: Part Submission Warrant and Submission (Weeks 8–10)

[ ] Element 17: Part Submission Warrant (PSW) — complete all fields, obtain supplier authorized signatures
[ ] Verify PSW against all elements: every required element is in the package before PSW is signed
[ ] Element 18: Bulk Materials Checklist — complete if part is a bulk material (not applicable for most discrete parts)
[ ] Full PPAP package assembled: organized per customer's preferred format or AIAG standard
[ ] Internal quality review: QE and quality manager review complete package before submission
[ ] Submission to customer — confirm submission method (portal, email, physical binder per customer preference)
[ ] Confirm receipt with customer and expected review timeline

Common Mistakes

1. Using prototype tooling parts for dimensional results. PPAP parts must be produced from production tooling, production equipment, and production process. Prototype or soft-tool parts are not acceptable for PPAP — even if the dimensions are identical. The customer is approving the production process, not the part geometry.

2. Not completing Gage R&R before the production run. If the measurement system isn't qualified (%R&R < 30% for general use, <10% for critical characteristics), your capability data may be driven by measurement variation, not process variation. Complete MSA first, then run capability.

3. Missing sub-tier supplier documentation. Your PPAP package is only as complete as your supply chain documentation. If your steel supplier doesn't have a material certification at the correct revision, your PPAP fails — not because of anything wrong with your process, but because of a missing document.

4. Signing the PSW before reviewing all elements. The Part Submission Warrant certifies that all elements are complete and conforming. Signing it before the complete internal review makes the quality manager personally responsible for any gaps the customer finds. Review every element before signing.

5. Submitting with Cpk below 1.67 without a deviation. If your initial capability doesn't meet the 1.67 target, you need customer approval of a conditional approval or deviation — not just a note in the submission. Conditional approvals come with action plans and timelines for achieving the target.

Quick-Start in gantt-chart.io

Go to gantt-chart.io and create a project named "[Part Number] PPAP"
Work backward from the customer's required PPAP approval date — typically 4–6 weeks before SOP
Add the significant production run as the critical path anchor — everything in Phase 1 and 2 must complete before the run
Add sub-supplier PPAP collection as a parallel workstream — it often takes the longest
Share with the quality team and flag the PSW submission date in the project header

FAQ

What PPAP level should we submit?

The customer specifies the PPAP level in their supplier requirements manual or in the specific program requirements. Level 1 is PSW only. Level 3 is full package to the customer. Level 5 is full package reviewed at the supplier's facility. Never assume level — confirm in writing with the customer purchasing or quality engineer.

What's a significant production run?

AIAG requires a minimum of 300 consecutive parts at the normal production rate (not a slow sample rate) on production tooling and equipment. Some customers require more. Check the customer-specific requirements section of their supplier quality manual.

Can we ship initial parts to the customer before PPAP approval?

Only with a customer-authorized deviation or interim approval. Never ship without documented customer authorization. Shipping without approval exposes you to rejection, return shipping costs, and potential supplier quality status downgrade.

What happens if a dimension fails in dimensional results?

If a dimension fails and it's not a special characteristic, document the failure, identify the root cause, correct the process, and re-measure. If it's a special characteristic, you cannot submit a PPAP with a failing special characteristic without a customer-approved deviation.

How long does a PPAP submission review take?

Most automotive customers target a 15-business-day review cycle for Level 3 submissions. In practice, 3–6 weeks is common. Plan for a first-submission rejection and one resubmission cycle in your project timeline — the PPAP is approved when the customer says it is, not when you submit.

PPAP approval unlocks production. Build the PPAP timeline at gantt-chart.io, start sub-supplier documentation collection early, and submit a complete package — because a rejected first submission costs more than the time you saved by rushing it.