Diabetes mellitus (DM) is one of the major cause of morbidity and among the top 10 causes of deaths in Hong Kong in 2008 (Department of Health 2009). The Hospital Authority (HA) has initiated service improvement through introducing the risk assessment and management programme (RAMP) to improve the quality of care (QOC) for DM patients in general outpatient clinics (GOPC). The evaluation on the QOC is an essential part of the programme in order to inform future policy. The Department of Family Medicine and Primary Care (FMPC) of the University of Hong Kong (HKU) has been appointed by the HA to carry out the evaluation of the QOC of the programme.