The SEA Strategic Environmental Assessment: deals with the early and integrated assessment of policies, plans and programs that affect the environment. The Integrated Environmental Assessment AAI: is the interdisciplinary and social process for the identification, analysis and evaluation of all relevant natural and human processes and their interactions.
The models are tools used to represent processes and prepare prognostics for system management. The models are not objective in themselves, but allow to analyze scenarios, studies of alternatives, to predict the occurrence of phenomena, among others. The models mainly used are mathematical models that express mathematically the functions of the processes.