Alternate selection processes specify a takeoff alternate on the OFP when weather or performance at the departure airport would prevent a return, located within the specified flying time; select at least one destination alternate on weather and operational information and a second where the destination weather is marginal or information is unavailable; and for isolated airports ensure a point of safe return, the fuel of DSP 4.3.11 and the conditions under which the flight may proceed (DSP 4.1.1 to 4.1.7).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.