A new approach to economic forecasting is presented in the Economy Dynamics Series publications below to overcome limitations in the current use of semi-empirical functions correlated to historical datasets. Existing forecasting methods produce unknown errors. This requires intervention by forecasters to process differences between model predictions and actual data from the recent past. Because the intervention process is specific to individual forecasters, two forecasters using the same model can end up with very different forecasts. The new approach, called Economy Dynamics, does not extrapolate semi-empirical functions and thereby avoids unknown errors. This will enable forecasts to be validated against metrics at a regional level such as economic output, poverty levels and inflation and against the environmental impact of consumer behaviour, which is not currently possible.