Analysis of Similarities and Differences of Measurement Uncertainty Evaluation in Metrological Standard Assessment and L

The evaluation of measurement uncertainty shares strong commonalities as well as essential differences when applied to the establishment of measurement standards and laboratory accreditation. Their commonalities lie in that the evaluation methods, analysis of uncertainty sources, evaluation procedures and other aspects comply with the same technical specifications. The differences are mainly reflected in connotation definition, evaluation purposes, evaluation objects, result application and so on. Correctly understanding and grasping these similarities and differences helps metrology technicians master the methods for uncertainty evaluation, improve work efficiency, ensure the scientificity and reliability of evaluation results, and provide strong support for the high-quality development of China’s metrology technology system.