Standards in the ISO 9000 family include:

• ISO 9001:2015 - sets out the requirements of a quality management system
• ISO 9000:2015 - covers the basic concepts and language
• ISO 9004:2009 - focuses on how to make a quality management system more efficient and effective
• ISO 19011:2011 - sets out guidance on internal and external audits of quality management systems.

ISO 9001:2015

ISO 9001:2015 sets out the criteria for a quality management system and is the only standard in the family that can be certified to (although this is not a requirement). It can be used by any organization, large or small, regardless of its field of activity. In fact, there are over one million companies and organizations in over 170 countries certified to ISO 9001.

This standard is based on a number of quality management principles including a strong customer focus, the motivation and implication of top management, the process approach and continual improvement. These principles are explained in more detail in the pdf Quality Management Principles. Using ISO 9001:2015 helps ensure that customers get consistent, good quality products and services, which in turn brings many business benefits.