Sodyna is currently developing Decision Support Systems based on simulation models that use most realistic assumptions, but which that are flexible enough to accomodate for users' own assumptions about social and economic behaviours...

Below is an illustration of a drastic qualitative change in long term evolutions of the spatial distribution of economic activities (here especially Market Services) of a city (here Milano) that might ensue when we manipulate sensitive parameters in a certain way...
This is all being worked out in our ComplexCity simulation tool.
You might want to take a look at our summary presentation (pdf in french) of our modelling approach.