RT Journal Article SR Electronic T1 Membership by Assessment of Performance: developing a method for assessing established general practitioners. JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 231 OP 235 VO 50 IS 452 A1 J Holden A1 J Wearne YR 2000 UL http://bjgp.org/content/50/452/231.abstract AB Over 200 general practitioners (GPs) and others have contributed to the development of Membership by Assessment of Performance (MAP): a new scheme for assessing established GPs. By means of a Delphi consultation with a broad cross-section of the profession, a working conference, piloting with potential candidates, and repeated checking with reference panels, the assessment was developed within two years. We report the development of MAP, including the results of the Delphi consultation, which asked 'Which aspects of a general practitioners performance are important to assess?'.