Fig. 2. The nested, iterative model development process proposed by Fall et al. (2001). Groups participate in all circles that surround them. The initial interest and desire for strategic SFM planning comes from the stakeholders and decision makers. All participants (stakeholders, decision makers, domain experts, core team members) set objectives, select scenarios, develop conceptual models, and discuss model results. Domain experts and the core team develop and verify the formal models. The core modeling team is responsible for organizing workshops and communication, gathering required information, implementing models, ensuring equivalence to formal conceptual models, running simulations, analyzing outputs, and documentation. (Reprinted with permission from Transactions in GIS 5(1): 67–86.)