There is nowadays a strong concern for standardization of laboratory quality assurance systems, since results acceptability and confidence depend on identification of the sources of variability, their control and documentation, as a result to a greater extent of word commercial globalization. During December 1999, the International Standard ISO 17 025 was published, establishing organizational and technical requirements for test and calibration laboratories, in order to get international recognition, into the context of World Trade Organization. In this paper, such requirements are discussed for clinical and chemical laboratories.

Quality Assurance; Quality Control; Standard ISO 17 025; Clinical Laboratory; Chemical Analytical Laboratory