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Estimation of Measurement Uncertainty: Simplified Methods

Abstract: This paper covers the basics of preparing uncertainty estimates for typical uncomplicated measurements. It presents a simple step-by-step process that applies to all fields of testing and calibration. The process is consistent with the ISO Guide for the Expression of Uncertainty in Measurement (GUM) but it dispenses, wherever possible, with algebraic notations, statistical terminology, arithmetic modelling, and differential calculus. In addition, a Simplified Alternative Method is discussed that uses the results of periodic measurements of a check standard to determine many of the uncertainty components in the measurement process.