In the present study, an evaluation framework for science and technology policies was developed and validated using a logical approach tailored to the policy context of Iran in the field of science and technology. The framework was weighted based on expert opinions. This research is applied in purpose and employed both qualitative and quantitative methods for data collection, thus falling under the category of mixed-methods research. Specifically, the evaluation framework was developed, validated, and prioritized through a review of existing models, analysis of upstream policy documents, and expert surveys. The findings revealed that the main dimensions of evaluation include: Input Stage: Financial resources, human resources, infrastructure, access to technology, laws and regulations, and institutional capacities. Process Stage: Coordination and participation, resource allocation, monitoring and evaluation, planning and policymaking, commercialization and technology transfer, capacity building and training, science diplomacy, and licensing. Output Stage: Financial resources, human resources, infrastructure, access to technology, laws and regulations, and institutional capacities. Outcome Stage: Economic, scientific and technological, educational and academic, institutional and infrastructural, environmental, self-sufficiency and competitiveness, and international rankings. Impact Stage: Economic, social, scientific and technological, cultural, environmental, and international. Finally, a Key Connections Table (origin, destination, causal relationship, and type of influence) was presented based on the logical framework. This table not only serves as an evaluation framework but also as a strategic management tool, helping policymakers make evidence-based decisions. It also enables institutions to demonstrate accountability for national science and technology policies and programs