What IAF and CNAs mean:IAF on the quality certification certificate refers to the International Accreditation Forum,and CNAs refers to the China National Accreditation Commission for conformity assessment.

　　IAF is the abbreviation of the International Accreditation Forum.It is a multilateral cooperation organization participated by relevant national accreditation institutions.It was founded in January 1993 and has more than 30 members.China National Accreditation Service for conformity assessment(CNAs)is one of its member units,and China is also one of the 17 sponsors.

　　The main objective of IAF is to coordinate the certification systems of various countries,and make them consistent in technical operation by unifying and standardizing the qualification requirements of auditors,training guidelines and the evaluation and certification procedures of quality system certification bodies in member countries,so as to ensure effective international mutual recognition.It includes two major organizations in the world,namely,the European Organization for Accreditation(EAC)and the Pacific Accreditation Cooperation(PAC).

　　CNAs certification is the abbreviation of China National Accreditation Service for conformity assessment(CNAs),which is combined and reorganized on the basis of the former China National Accreditation Service(CNAB)and China National Accreditation Service for laboratories(CNAL).

　　Extended data:

　　The basis of product quality certification or the condition of approval certification is that the product(service)quality should meet the requirements of the specified standards,the quality system should meet the requirements of the specified quality assurance standards,and the way to prove approval certification is to issue product certification certificates and certification marks.Its certification mark can be used on products approved for certification.

　　Before the certification system came into being,the seller(the first party)usually used the"product conformity declaration"to win the trust of customers(the second party)in order to promote its products.This method was feasible when the product was simple and the advantages and disadvantages could be visually judged without special detection means.

　　However,with the development of science and technology,the variety of products is increasing,and the structure and performance of products are becoming more and more complex.It is difficult to judge whether the products meet the requirements only by the knowledge and experience of the buyer;In addition,the seller's"Declaration of product conformity"is not always credible,and the reputation and role of this way will gradually decline.In this case,the product quality certification system came into being.

　　At present,the product quality certification of all countries in the world is generally based on international standards.60%of these standards are formulated by ISO,20%by IEC(International Electrotechnical Commission),and the remaining 20%are formulated by other international standardization organizations.

　　Product quality certification includes conformity certification and safety certification.