In Practical 2, we discussed the criteria that can be used to evaluate success of a new health service. Donabedian1further categorized measures of health care quality as: Structure Process Outcome To formally evaluate a public health programme, the United States Centers for Disease Control and Prevention suggest the following framework2: Engage stakeholders Describe the programme Focus the evaluation design Gather credible evidence Justify conclusions Ensure use and share lessons learned 1Donabedian A. The quality of care. How can it be assessed? JAMA1988; 260(12):1743-8. 2Centers for Disease Control and Prevention. Framework for program evaluation in public health. MMWR1999; 48(No. RR-11):1-40.