Advanced Quality Planning: A Commonsense Guide to AQP and APQP

Chapter 7: Prototype Development Tools: Customer-Driven Prototype Involvement

When the first essentially complete units of the product/process are built and tested, tests to evaluate factors of basic design capability, environmental effects, and reliability for extended periods of operations are conducted. The adequacy of the basic design approach is being sought. If the product/process is not capable, the flaws are to be designed out now, not later (Juran, 1988).

AQP and the Prototype Stage

AQP is aimed at excellence in serving the customer's needs. The prototype level of AQP programming is aimed at achieving continuous quality improvement through improved supplier process capability.

During AQP, process capability must be assessed on selected significant or critical characteristics. Modified initial sample report (ISR) and percentage of indexes with process capability/percentage of inspection points satisfying tolerance (PIPC/PIST) analysis is expected prior to shipment of prototype parts supporting the three major prototype builds:

  1. EP, Evaluation Prototype

  2. VP, Verification Prototype

  3. FP, Functional Prototype

Decisions will be managed by facts that are supported by statistically valid, numeric data.

Procedures for Prototypes

In all prototype work the following general characteristics apply:

  • Prototypes are usually the supplier's responsibility

  • Modified ISR paperwork is required

  • Capability studies and indexes are required where applicable and appropriate

    • C p/C r

    • C pk

    • P p/P pk

  • A quality improvement plan is required for quality deficiencies

  • A quality C p/C r form is issued at prototype builds

Planning for Prototype Tooling Capability

Prototype tooling, rather than being a distinct and separate program, is now the beginning of the final production...

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