Calculation and proper presentation of the measurement uncertainty in testing

This paper deals with metrology elements, such as measurement uncertainty and traceability in testing laboratories. Newly implemented standard ISO/IEC 17025 is taken into consideration. The paper is focused at uncertainty analysis of test procedures on examples as useful case studies. It describes uncertainty propagation and proper decision of conformance or non-conformance with specifications. The knowledge and awareness regarding all facts about measuring, traceability, measurement uncertainty, calibration and testing requirements, is essential in order to make the right conclusion on safety of products.