The document describes the ABCD model for program evaluation. The model has four components: A) beneficiaries or clients of the program, B) the program itself, C) effects or outcomes of the program, and D) social impact. An example study is described that uses the ABCD model to evaluate a Botika ng Barangay (BnB) or community drugstore program. The study assesses the program's contributions to community health, savings, and living standards. The evaluation finds positive effects including reduced health expenditures and improved health outcomes.