Evaluates and interprets results based on analysis of the suitability of the specimen, requirements of the requested test, purpose of the study, events of reactivity, test conditions, chemical reactions, instrument function, types and frequency of control procedures, validity of data in relation to the test system and assay procedures, correlation of the test result with other laboratory and/or patient data, and other similar factors. Involves: Checking specimens, preparing reagents, calibrating and operating instruments, performing analyses, correcting malfunctions, calculating results, and validating the data.