FASSET is a whole-farm dynamic model, which can be used as a tool to evaluate consequences of changes in regulations, management, prices and subsidies on a range of indicators for sustainability at the farm level, e.g. farm profitability, production, nitrogen losses, energy consumption and greenhouse gas emissions.

FASSET ver. 2.0 can simulate arable, pig and dairy farms.

The model distinguishes and links different farm components, including field (crops and soil), animals, housing and manure storages. The model allows different field and farm management options to be explored. This includes different crop rotations and crop management options as well as different livestock feeding practices and different technologies for managing manures. The model can be used for comparing with observed experimental data and for exploring consequences of environmental and management changes for farm productivity and environmental impacts.