Document control ensures that accurate, up-to-date documents are readily available when and where required. All documents and data pertaining to the quality system must be adequately identified, prepared, reviewed, revised, approved and maintained. Thus, the issuance and approval of quality system documents and data, including the preparation, updating and maintaining the Master List of Quality System Documents, as well as the document and data changes are covered here. The scope of documentation to be controlled includes the Quality Manual, procedures, instructions, records and course and research project plans. The need for and use of each document must be clear and regularly reviewed.