ISO 9000:2015 describes the fundamental concepts and principles of quality management which are universally applicable to the following:

organizations seeking sustained success through the implementation of a quality management system
customers seeking confidence in an organization' s ability to consistently provide products and services conforming to their requirements
organizations seeking confidence in their supply chain that their product and service requirements will be met
organizations and interested parties seeking to improve communication through a common understanding of the vocabulary used in quality management
organizations performing conformity assessments against the requirements of ISO 9001
providers of training, assessment or advice in quality management
developers of related standards.

ISO 9000:2015 specifies the terms and definitions that apply to all quality management and quality management system standards developed by ISO/ TC 176.