Organisational responsibilities, authorities and reporting relationships should be clearly defined and communicated in any quality management system. Senior management should conduct regular management reviews of the effectiveness of the system and take actions to improve. Contracts with third parties should be documented, reviewed and mutually agreed. Documents to support the quality management system should include a quality manual and those documents needed to ensure the centre’s processes are planned and operate effectively and records to demonstrate compliance. A quality policy should express the overall intentions of the organisation related to quality and provide a framework for setting quality objectives and planning. The quality policy should be signed and issued by the most senior manager within the organisation then communicated, understood and available throughout the organisation.