Production Part Approval Process

Purpose

Production Part Approval Process ("PPAP") is the industry standard that ensures engineering design and specification requirements are met. The purpose of PPAP is to verify whether the supplier’s manufacturing process is capable of consistently producing product meeting all product engineering design and specifications, and demonstrate the developed packaging eliminates damage during transportation, handling, and storage.

PPAP Workbook

All documents must be submitted in Westport Fuel Systems accepted format. Download the Production Part Approval Process (PPAP) for a detailed explanation.

Associated Templates Are Listed below Each Step.

1. Design Records Drawings
2. Engineering Change Documents (If Any) Change Documents
3. Customer Engineering Approval
4. Design FMEA

   • DFMEA Template

5. Process Flow Diagrams Process Flow Charts

   • PFD Template

6. Process Fmea Process-potential Failure Mode and Effects Analysis

   • PFMEA Template

7. Control Plan Process/Product Control Plan (Cp)

   • Process Control Plan Template

8. Measurement System Analysis Studies Gage R&R, Bias, Linearity and Stability

   • Gage R&R Report Attributes

   • Gage R&R Report Results

   • Gage R&R Report Results Within-part Variation (Wiv)

9. Dimensional Results Report Dimensional Layout

   • Dimensional Results Report

10. Material, Performance Test Results Gage R&R, Bias, Linearity and Stability

    • Material Test Results

    • Performance Test Results

11. Initial Process Study Capability (Cpk/Ppk) Studies
12. Laboratory Scope and Accreditation 17025 Certification
13. Aar Appearance Approval Report

    • Appearance Approval Report

14. Sample Parts PPAP Samples 15. Master Sample
15. Master Sample
16. Checking Aids
17. Record of Compliance

    • Bulk Material Requirements Checklist

    • Bulk Material Interim Approval

18. Psw Part Submission Warrant

    • Part Submission Warrant

19. IMDS

    • IMDS

20. Packaging

    • Packaging Data Sheet

Downloads

• Production Part Approval Process (PPAP)

  July 4, 2022

• PPAP Checklist

  October 4, 2014

PPAP Checklist

The checklist indicates the elements required by Westport for the Production Part Approval Process.

The submission level pertains to only what must be submitted. All of the elements must be completed by the supplier unless you explicitly waive them.

S = submit to the customer
R= Retain at the manufacturing location and make available to the customer if requested
* = Retain at the manufacturing location and submit to the customer if requested

Documentation Definitions

Each submission element is described in detail below. Westport has outlined specific requirements for each element.

Templates

Templates have been included for your use. These are AIAG (Automotive Industry Action Group) standard templates. Manuals relating to these activities are available through AIAG website at www.aiag.org. If your organization uses non AIAG standard templates for these activities, please forward a blank copy to Westport for approval prior to proceeding with PPAP activities.

Part Submission Warrant (PSW)

The Part Submission Warrant is required for each submission and must be completed and forwarded with PPAP package.