Overview 

The introduction provided an overview of the infrastructure model within IFs, noting that this involves moving through the following sequence for each forecast year. This section describes each of these five steps: 

1. Estimating the expected levels of infrastructure
2. Translating the expected levels of infrastructure into financial requirements
3. Balancing the financial requirements with available resources (Determining the Actual Funds for Infrastructure Spending)
4. Forecasting the actual levels of attainable infrastructure
5. Estimating the social, economic, and environmental impacts of the attainable infrastructure