This paper gives a theoretical overview of the revision of ISO 9001 standards. The standards from their creation to the present day are shown. We also talk about their strengths and weaknesses, which have led to new revisions to the standards from 1994. The task of the standards is to satisfy the wishes and needs of customers, and its purpose is to set requirements for the establishment and maintenance of a quality management system. It can be applied to organizations of all types and sizes such as small, medium, large, for-profit, not-for-profit, manufacturing, etc. It is necessary to manage the organization in the right way in order to achieve successful operation and leadership. ISO standards ensure safety, reliability and good quality of products and services. Companies, innovators, customers, consumers, government, traders, developing countries and many others benefit from the application of ISO standards.