PPAP deliverable guide

How to complete Measurement System Analysis (MSA) Studies

MSA evidence shows whether the measurement system is suitable for its intended product or process decision.

Complete the fields

Characteristic and decision
Identify the characteristic, tolerance or acceptance criterion, and what decision the measurement supports.
Measurement system definition
Identify gauge or test equipment, fixture, software, method, environment, appraisers, and calibration status.
Study type and procedure
State the study used—such as variable gauge repeatability and reproducibility, bias, linearity, stability, or attribute agreement—and the approved procedure.
Parts, appraisers, and trials
Record part identifiers, appraisers, number of trials, and selection rationale. Parts should represent the process variation needed for the study.
Results and acceptance decision
Report the calculated results, acceptance criteria, conclusion, limitations, and action if the system is not acceptable.

Step-by-step completion sequence

  1. Define the measurement decision and customer or internal acceptance criteria.
  2. Verify calibration and select a study type suitable for the measurement.
  3. Run the study under representative conditions using documented part, appraiser, and trial information.
  4. Analyze results according to the approved MSA method.
  5. Improve and repeat the study where needed before using the system as PPAP evidence.
PPAP control point: The customer’s current submission request, customer-specific requirements, and approved forms control. This guide explains a practical way to prepare the record; it does not authorize a substitute format or acceptance criterion.