Control options represent the alternative actions, strategies, and/or policies that can be set about to affect the system behaviour (e.g., increasing the area of the lagoon dedicated to aquaculture). They are described by value assignments of the controllable variables (e.g., the amount of lagoon surface devoted to aquaculture). It is assumed that the system reacts to given values of the controllable variables (the causes) by changing the values of a set of dependent variables (the effects). For instance, if the area of the lagoon dedicated to aquaculture is increased, this affects the quantity of harvested clams