Program evaluation is a systematic research field and methodological approach dedicated to assessing the design, implementation, and outcomes of interventions, policies, or initiatives, commonly referred to as 'programs'. It investigates questions concerning a program's relevance, efficiency, effectiveness, impact, and sustainability by rigorously collecting and analyzing qualitative and quantitative data using various research designs. Its significance lies in providing evidence-based judgments to inform decision-making, improve program performance, ensure accountability to stakeholders, and contribute to the theoretical and practical understanding of social and organizational change efforts.