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Title: Measurement Uncertainty Misconceptions Mums The Problem
Author: Ricardo A. Nicholas
Source: 2000 Measurement Science Conference
Year Published: 2000
Abstract: The meanings of certain measurement uncertainty terms and treatments are occasionally a challenge to understand. This can lead to misconceptions, which if left uncorrected and communicated to others, can seriously compound the problem. This paper intends to clarify a few of these terms and treatments. Presented topics include: Systematic versus Random Effect (Error), Systematic versus Random Uncertainty, Type A versus Type B Uncertainty Evaluations and Components, Relative Uncertainty, Type B Degrees of Freedom, and The Treatment of Known Systematic Effects (Errors). The clarifications made are consistent with the ISO 5 and ANSI/NCSL 3 Guides to the Expression of Uncertainty in Measurement. Explanations are only as complex as necessary to sufficiently clarify the terms and treatments.

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