Abstract:
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Uncertainty evaluation is an important activity, leading in most cases to refinement of the test methods, better knowledge of the test equipment limits, and understanding limitations in measurement accuracy. The first part of this paper will show an application of the concept of uncertainty evaluations using it to adjust a comparison test method in order to obtain higher accuracy. The analysis of the uncertainty components and their correlations will also emphasize some sources of common mistakes and the restrictions that apply. It will be shown that more accurate methods may require additional tests, and may be longer and more expensive than initially expected. In the second part of the paper, aspects will be presented on how the influence of the environmental parameters is accounted for in the uncertainty budgets, pointing to causes for underestimated uncertainties.
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