Evaluating the uncertainty of test results - Examples from chemical analysis and materials testing at BAM

At BAM, GUM-compliant evaluation and expression of uncertainty for quantita tive test results was introduced in early 1996. After a brief overview of e ssential steps and experience so far, uncertainty evaluation is presented f or examples from two main fields of BAM's testing activities: analysis of i norganic materials by atomic spectrometry and mechanical materials testing using tensile/compression testing machines. Finally, an outlook is given on the evaluation of uncertainty for qualitative test results. This paper is a supplementary contribution to the topic of the tm special edition on GUM- compliant evaluation of measurements published January 2001.