Progress in information and communication technology makes quality assurance vulnerable component of the system. Quality assurance is part of the quality management system that focuses on creating a trust to satisfy the basic requirements related to quality. Quality is customer satisfaction, therefore, must take care that the products and services fulfill quality requirements of customers. It's a assignment of standards issued by the International Organization for Standardization (ISO) with help of team of experts around the world. In the range with standards that are in its property, four main groups of standards related to quality assurance in information technology are specialized, and these are the standards of groups ISO 9000, ISO/IEC 20000, ISO/IEC 27000 and ISO/IEC 25000. The organization with a certification process receives the certificate by an authorized certification company which confirms that the organization please the requirements imposed by the standard, and with that proving its ability to purchase a consistent product that meets customer requirements and the requirements of laws and regulations. International Organization for Standardization has an important influence over the international trade and its member states around the world because with standards enteres on almost all aspects of daily life and in that way ensuring the safety of consumers and the quality of products and services with which meets face to face every day.