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, instability of the transfer standard can lead to an inconclusive comparison result. If the transfer standard uncertainty is large relative to a participating laboratory's uncertainty, the commonly used standardized degree of equivalence ≤ 1 criterion does not always correctly assess whether a participant is working within their uncertainty claims. We show comparison results that demonstrate this issue and propose several criteria for assessing a comparison result as passing, failing, or inconclusive. We investigate the behavior of the standardized degree of equivalence and alternative comparison measures for a range of values of the transfer standard uncertainty relative to the individual laboratory uncertainty values. The proposed alternative criteria successfully discerned between passing, failing, and inconclusive comparison results for the cases we examined.

中文翻译：

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转移标准不确定性可能导致实验室间比较不确定


实验室间比较使用最佳可用转移标准来检查参与者的不确定性分析，识别低估的不确定性声明或未知的测量偏差，并改进全球测量系统。对于某些被测量，传递标准的不稳定可能导致不确定的比较结果。如果转移标准不确定度相对于参与实验室的不确定度较大，则常用的标准化等效度 ≤ 1 标准并不总能正确评估参与者是否在其不确定性声明范围内工作。我们展示了证明此问题的比较结果，并提出了用于评估比较结果为通过、失败或不确定的几个标准。我们研究了一系列转移标准不确定度值相对于各个实验室不确定度值的标准化等效度和替代比较措施的行为。所提出的替代标准成功地区分了我们检查的案例的通过、失败和不确定的比较结果。