Accreditation in accordance with the international General Requirements for the Competence of Testing and Calibration Laboratories (HRN EN ISO/IEC 17025 standard) has become a widely accepted method of quality management and objective evidence of technical competence. knowledge. and skills of testing and calibration laboratories. In 2010. https://anlsvgcssz23.aioblogs.com/87842995/the-study-of-role-of-transactional-model-constructs-in-yazd-teachers-of-primary-school-by-using-of-structural-equation-model