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Title: Pass / Fail / Inconclusive Criteria For Inter - Laboratory Comparisons
Author: John Wright Blaza Toman Bodo Mickan Gerd Wbbeler Olhabodnar Clemens Elster
Source: 2015 International Symposium on Fluid Flow Measurement
Year Published: 2015
Abstract: Inter - laboratory comparisons use the best available transfer standards to check the participants uncertainty analyses, identify underestimated uncertainty claims or unknown measurement biases, and improve the global measurement system. For some measurands (e.g., flow) instability of the transfer standard can lead to an inconclusive comparison result. If the transfer standard uncertainty is large relative to a participating laboratorys uncertainty, the commonly used standardized degree of equivalence ?? ? ?1 criterion does not always correctly assess whether a participant is working within its uncertainty claims. We show comparison results that demonstrate the problem and discuss the loss of explanatory power in terms of statistical hypothesis tests

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