Stability, Bias and Linearity define the ___________ of a Measurement System.

Question

Options

• ASensitivity
• BRepeatability
• CAccuracy
• DPrecision

• A
  7% (2)
• B
  4% (1)
• C
  70% (19)
• D
  19% (5)

Explanation

Accuracy (C) is the correct answer because, in Measurement System Analysis (MSA), the three components used to evaluate how close measurements are to the true value - Stability (consistency over time), Bias (systematic offset from true value), and Linearity (consistency of bias across the measurement range) - collectively define a measurement system's accuracy.

Why the distractors are wrong:

• A. Sensitivity refers to the smallest detectable change a measurement system can detect - it is a separate characteristic unrelated to this trio.
• B. Repeatability is a single component of Precision, specifically the variation when one appraiser measures the same part repeatedly with the same tool.
• D. Precision is defined by Repeatability and Reproducibility (the Gauge R&R components), not by Stability, Bias, and Linearity.

Memory tip: Use the acronym "BLS = Accuracy" - think of it as your measurement system needing a balance sheet: Bias, Linearity, and Stability all audit how close you are to the truth (accuracy), while Repeatability + Reproducibility audit how consistent you are (precision).

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