The logic behind FEPF is straightforward: identify and map where management objectives exist on the landscape (or where their important habitats exist); identify critical fire weather threshold conditions (such as 80th, 90th, 99th percentile Energy Release Component) and map fire behavior under each of these; identify how fire under each threshold condition is likely to affect the management objective (or the habitat parameters on which it depends, such as large, early seral trees); and use this link between fire behavior and management objective to create a fire effects library. The choice of computer models to generate habitat and fire behavior is up to the user. Here in the United States, FireFamilyPlus (FF+) can be used to determine the typical fuel moisture and ambient weather conditions associated with each of the threshold conditions. FlamMap can be used to generate a wall-to-wall map of a number of fire behavior parameters (fireline intensity, crown fire potential, rate of spread, heat per unit area). Other countries may have different programs that generate similar information. Base vegetation and fuels conditions are derived from existing satellite imagery or modeled via a vegetation dynamics simulation model. The assessment of fire effects is based on species-habitat relationships and the known effects of fire on habitat parameters documented in the scientific literature or developed through expert-knowledge systems.