The demands that the quality should meet can be of two tipes: the ones called “primary” (related to the protection of fundamental rights such as health and safety and protected by the Technical Rules for compulsory prescription) or “accessory” (relating to the development of the economic system and all ‘improving well-being of society and protected by the application of rules of voluntary application).

The rules belonging to the family of ISO 9000 have been prepared to help organizations to develop their own systems of quality management and are nothing if not a set of ideas, principles and rules. The standards of quality provide evidence that the certified organization works according to a certain standard of reference and that is able to provide products / services with the characteristics of desired qualities (that can be established between the customer and the organization or to read / regulations).