ADM is a systematic approach to the mental process used by pilots to consistently determine the best course of action in response to a given set of circumstances.
3P Model
Perceive: Think about the circumstances related to the Pilot, Aircraft, enVironment, and External pressure. (PAVE)
Process: Evaluating their impact on flight safety. Think the Consequences, Alternatives, Reality of the situation and External pressure. (CARE)
Perform: Determine the best course of action.