@gh56 and @merzkrashed had talked about the 3 basic concepts of QM principles: system approach, process approach, and factual approach. I would like to add on some other principles that I think are also important:
1. Customer focus: it emphasizes that a business should understand the demand and customers’ needs and expectations. More effective processes can result in improved customer satisfaction.
2. Leadership: The business should have a clear and strong leadership to have specific goals and objectives for all employees involving and achieving these goals.
3. People involvement: It focuses on making all employees (full-time, part-time and contractors etc) be motivated, responsible and accountable for their actions.
4. Continual improvement: adaptation to a new market situation and constant performance improvement.
5. Mutually beneficial supplier relations: It supports the relationship between the company and its suppliers and this interdependent relationship.