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The document introduces the Sustainable Asset Valuation (SAVi) methodology, a simulation-based tool designed to calculate environmental, social, governance, and climate risks, as well as externalities in infrastructure projects. It details the three-pronged modelling approach—system dynamics, project finance, and spatially explicit models—to provide a more comprehensive cost-benefit analysis than traditional financial valuations. The report provides sector-specific examples (energy, buildings, roads, wastewater, irrigation, and natural infrastructure) and outlines how these modules can be integrated into Indonesia's Vision 2045 (IV2045) system dynamics model to bridge top-down national strategy with bottom-up project implementation.