SAVi combines the outputs of systems thinking and system dynamics simulation with project finance modelling.

System Dynamics Modelling

SAVi system dynamics modelling is conducted using Vensim, an industrial-strength software that can be used for simulating social, economic and environmental systems.

The model forecasts how the infrastructure project will affect and be affected by the environmental, social and economic dynamics of the “system” in which it is being planned, financed, built and operated. We develop systems maps or causal loop diagrams for a fast, accurate analysis of causes, effects and resulting model dynamics. Once this blueprint is complete, we create the mathematical model. We then simulate different risk scenarios to calculate how the asset performs under each of them. We can also change model inputs in real time, generating updated results within seconds. 

Despite the variety of scenarios and outcomes that can be generated using the SAVi system dynamics models, simulation experts may consider this range to be relatively limited. Its complexity lies in the high number of cross-sectoral and cross-dimensional linkages.

Project finance modelling

The SAVi project finance model is built in Microsoft Excel following Corality SMART, which is widely considered to be the industry’s best practice standard.

This model simulates how different risk scenarios affect the project’s financial viability across its life cycle, as well as how material externalities can affect future cash flows.  We can therefore assess whether the cash flows generated by the project will be sufficient to service debts and generate an attractive risk-adjusted return for equity and debt investors. We generate results on the return on investment, gross margins, internal rates of return, net present values, debt service coverage ratios, loan life coverage ratios and other indicators as requested.

Our model is also well placed to stress test projects and assess how the expected returns change under certain risk scenarios, such as climate risks, operational risks, environmental risks, legal risks, revenue risks and more.