A self-made military strategist of Cold War vintage, Boyd devised his “OODA” decision cycle—observe, orient, decide, act; lather, rinse, repeat—to explain how combatants adapt to ever-changing surroundings. Source: Internet
Boyd perceived maneuverability as the primary means of getting "inside" an adversary's decision-making cycle, a process Boyd called the " OODA loop " (for "Observation-Orientation-Decision-Action"). Source: Internet