Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The OODA loop (for observe, orient, decide, and act) is a concept originally applied to the combat operations process, often at the strategic level in both the military operations. It is now also often applied to understand commercial operations and learning processes. The concept was developed by military strategist and USAF Colonel John Boyd. It has become an important concept in both business and military strategy. According to Boyd, decision-making occurs in a recurring cycle of observe-orient-decide-act. An entity (whether an individual or an organization) that can process this cycle quickly, observing and reacting to unfolding events more rapidly than an opponent, can thereby "get inside" the opponent''s decision cycle and gain the advantage.