By Hening Huang A variety of statistical methods are available for estimating consensus values in interlaboratory studies (including key comparisons). These methods, although developed based on different approaches and ranging from simple to complex, produce […]
by Manuel Rodríguez In this paper, the Probability of Pass (PoP) and the Probability of Fail (PoF) are derived following a metrological approach, in which concepts such as repeatability, number of effective degrees of freedom, […]
by Pedro Adame One of the newest, hence less studied standards for calibration is the ANSI/NCSL International Z540.3 standard. The main difference with the more known ISO/IEC 17025 standard is the need to estimate and […]
The GUM Tree Calculator (GTC) is a data processing tool with full support for uncertainty calculations involving real and complex quantities. GTC is a stand-alone executable for Windows. It can handle instructions typedat the command […]
by Donald Larson Many digital oscilloscopes have the capability of acquiring, displaying, and storing a digitized representation (the waveform) of an electrical signal. This digitization creates data, the waveform samples, that have discrete amplitude values […]
by Hening Huang This paper further explores the t-interval method and the mean-unbiased estimator for uncertainty estimation with a small number of measurements. It describes the logic behind the error bound-based definition of uncertainty, which […]
by Henry A. Zumbrun Imagine that a satellite is launched into space and communications are intermittent. This happens because the satellite is wobbling, which causes connection problems in the receiver. The cause of the wobbling […]
by Richard Hogan Resolution uncertainty is the uncertainty in measurement contributed by resolution of measurement equipment. Resolution Uncertainty is a factor that contributes to uncertainty in measurement. Its influence should be considered in every uncertainty […]
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