Distinguishing Variable and Attribute Measurement Methods for First Article Inspection
Published .
Related
- AS9100
Topics
- fai
- as9102-form-3
- metrology
- optical-comparator
- variable-data
During the preparation of an AS9102 First Article Inspection (FAI) package, quality personnel utilized an optical comparator to verify 2D part features and corner radii. Discrepancies arose regarding whether the measurements should be recorded on Form 3 as qualitative attribute results or quantitative variable data.
Inspection personnel frequently recorded pass/fail results based on visual overlay templates, failing to record numerical variable measurements even though the optical equipment was equipped with digital readouts and calibrated micrometer stages.
Common Mistakes
- Missing balloon numbers on the drawing.
- Title block requirements not accounted for on Form 3.
Best Practice
Ensure inspection planning distinguishes between overlay comparison and calibrated digital stage measurement on optical metrology equipment. Always record discrete numerical values on AS9102 Form 3 when the measurement setup supports variable data capture.
Reflects the recommended position based on community discussion and expert review.
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