VOCABULARY Units of measurement . Standards Calibration Traceability Tolerance Accuracy . Precision Errors Uncertainty Abdul Nazeer 19 STANDARDS Physical objects, the properties of which are known with sufficient accuracy to be used to evaluate other items. In chemical and biological assays, substances or solutions used to establish the response of an instrument or assay method to an analyze Documents established by consensus and approved by a recognized body that establish rules to make a process consistent Example ISO 9000 ASTM standard method Abdul Nazeer VOCABULARY Units of measurement . Standards Calibration Traceability Tolerance Accuracy . Precision Errors Uncertainty Abdul Nazeer 19 STANDARDS Physical objects, the properties of which are known with sufficient accuracy to be used to evaluate other items. In chemical and biological assays, substances or solutions used to establish the response of an instrument or assay method to an analyze Documents established by consensus and approved by a recognized body that establish rules to make a process consistent Example ISO 9000 ASTM standard method Abdul Nazeer