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Approving Vision-Based Measurement Systems in the Presence of Within-Part Variation

Summary: Measurement systems analysis (MSA) is a combination of designed experiments and quantitative criteria used to approve gauges. This article presents a methodology for MSA when the measuring device is robust to minor differences in part orientation and the quality characteristic is variable within the part. The methodology includes a gauge study design, an analysis of variance (ANOVA) model, and estimators for input variances. The technique is developed for a vision gauge used to measure variable surface features of a component and demonstrated with data provided by the manufacturer.

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  • Topics: Design of Experiments
  • Keywords: Analysis of variance (ANOVA), Gauges, Measurement system, Variation
  • Author: Majeske, Karl D.
  • Journal: Quality Engineering