ISO 9001:2015 standard is based on several 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. View as PDF

Source: https://www.iso.org/iso-9001-quality-management.html