SADC Polic y for Strategy Development, Planning, M onitoring and Evaluation 4.4.1 Evaluation of operational plans 30. The evaluation of operational plans shall mainly aim at providing insights on the service delivery mission of the Secretariat with regard to the implementation of the RISDP and SIPO. To be meaningful and enable in-depth analysis, evaluation exercises should be organised in a way that focus can be made on a few specific sectors at a time. The evaluation findings on individual sectors will be used as input to an overall evaluation of the Medium Term Revenue and Expenditure Framework and the Five-Year Corporate Plan. A combination of selfevaluation and external evaluation may be used for sector evaluation exercises. However, the evaluation of the Medium Term Revenue and Expenditure Framework and the Five-Year Corporate Plan should be carried out by external evaluators on intervals of at least five years. 31. The detailed scope and timing of evaluations should be adapted to decision making needs and to the life cycle and nature of interventions. The Secretariat shall: i)  evelop technical and methodological guidelines that adhere to inD ternational professional standards to ensure high quality of evaluation exercises. The guidelines will apply to self-evaluation as well as external-evaluation; ii) P  repare on an annual basis an evaluation plan, indicating the sector or sectors, for which evaluation would be carried out and include it in the Annual Operational Plan to secure funding. 4.4.2 Evaluation of protocols and other core policies 32. Evaluation of protocols and other core policies will provide insights mainly on the relevance, effectiveness, impact and sustainability of SADC regional policies in the various sectors of intervention. The evaluations look at all the stages of the life-cycle of the policy from the design to implementation. The task for such evaluation will be undertaken with the cooperation of Member States. The detailed 18