The Unified Cost-Benefit Analysis (UCBA) Guidelines (Limestone 2025), developed by Limestone Analytics, provide a standardized framework for designing, documenting, and communicating cost-benefit and cost-effectiveness analyses. The guidance aims to improve transparency, consistency, and reliability in economic evaluations used for policy and investment decisions. UCBA emphasizes developing a clear model specification that outlines assumptions, data sources, analytical steps, and relationships between costs and benefits before implementation. This structured approach helps analysts present their methods in a logical and verifiable format, allowing stakeholders to understand and replicate results. The guidelines also support integration of multiple impact dimensions—such as economic, social, and environmental outcomes—within a single analytical model. By promoting standardized documentation and model transparency, UCBA strengthens evidence-based decision-making for governments, development organizations, and private sector actors evaluating complex projects and policies.
