2.1 The ISO 9000 family addresses various aspects of quality management and contains some of ISO's best known standards. The standards provide guidance and tools for companies and organizations who want to ensure that their products and services consistently meet customer's requirements, and that quality is consistently improved. In light of the above statement, outline the rationale behind a Quality Management System (QMS) and discuss the key requirements and responsibilities of the leadership and management in developing an ISO 9000 quality management system.