Transcription of TUTORIAL No 2 How to determine repeatability and ...
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3rdEuropean-American Workshop on NDE ReliabilityTUTORIAL No 2 How to determine repeatability and reproducibility (R&R)Dr Damir of Zagreb, Department of Quality, Faculty of Mechanical Engineering & Naval Architecture, CroatiaTutorial , terminology / experiment(how to perform,layout, DoE) analysis (statistical analysis, examples) remarks& discussionLiterature21. IntroductionConcept of R&R as a measure of precision in measurement laboratories, was introduced & developed during 1978-1983 [2]. It was widely accepted but also criticised, and finally resulted with ISO 5725 in any other field,first essential prerequisite is to exchange information, data and knowledge and to understand each other properly so, convention about definitions is "Each term must have the same meaning for all of its users; it must therefore at the same time express a well defined concept and not to be in conflict with every
Performance of the experiment (2) ˜It is essential that a group of n measurements on each level be performed independently (independent repetitive test results).˜Sometimes, despite instructions to …
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