MSA Example: Attribute or Categorical Data - Juran Institute
MSA Example: Attribute or Categorical Data - Juran Institute
MSA Example: Attribute or Categorical Data - Juran Institute
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<strong>MSA</strong> f<strong>or</strong> <strong>Attribute</strong> <strong>or</strong> Categ<strong>or</strong>ical <strong>Data</strong>DefinitionsAccuracy: Overall agreement of the measured value with the true value (which may be an“expert” value). Bias plus precision.<strong>Attribute</strong> <strong>Data</strong>: Discrete qualitative data.<strong>Attribute</strong> Measurement System: Compares parts to a specific set of criteria and accepts theitem if the criteria are satisfied.Bias: A systematic difference from the true value. Revealed in the differences in averages fromthe true value.Precision: Variation in the measurement process.R&R: Repeatability and Reproducibility. Two elements of precision.Repeatability: The variation observed when the same operat<strong>or</strong> measures the same itemrepeatedly with the same device.Reproducibility: The variation observed when different operat<strong>or</strong>s measure the same parts usingthe same device, sometimes it can be the same operat<strong>or</strong> using different devices.The list provides a quick reference f<strong>or</strong> key terms used in Measurement System Analysis.All Rights Reserved, <strong>Juran</strong> <strong>Institute</strong>, Inc.2#### XXXX.#### vx
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