Team requirements:
Multi-disciplinary team that comprises at least an economist and bio-physical scientist
Software requirements:
Microsoft Windows 95 or newer operating system
At least 100 Mb free space on hard disk
Statistical package (all current applications are based on SAS software)
Data requirements (minimum):
Farm survey data
Soil map 
Chemical and physical soil properties (depending on the crop growth and environmental impact models)
Daily (depends on model requirements) weather data
Model requirements:
Calibrated crop growth model (e.g. DSSAT model)
Environmental impact model (depending on sustainability indicators)