In order to consistently implement quality at all levels of operation, all activities of the employees of PHI CJZ-TETOVO are aimed at fulfilling the requirements, needs and expectations of customers. By implementing the international quality systems ISO 17025:2018 and ISO 9001:2015, from 2008, i.e. 2015 until today, a high level of satisfaction of customers and interested parties is achieved, which refers to the work in the laboratories and other departments in the institution.