Turbulent situations produce opportunities for victory, and agile competitors succeed by consistently identifying and exploiting opportunities more quickly and effectively than rivals. But how do they do so? If agility confers success, what confers agility? This was the question that US Air Force Colonel John Boyd tackled when he analyzed the surprising success of the American-made F-86 Sabre fighter against the MiG 15 in dogfights during the Korean War. Boyd discovered that the Sabre had two structural advantages–a bubble canopy and full hydraulics–that largely explained their success. Looking through the bubble canopy, pilots  could develop and maintain a fuller understanding of battle as it unfolded, and the plane’s full hydraulics allowed them to shift quickly from maneuver to maneuver to stay one step ahead of their adversaries.

If Boyd had ended his analysis here, he would have provided a compelling answer to a specific question. Instead Boyd generalized his findings by viewing the dogfights over the Korean peninsula as the distilled essence of a much more general phenomenon–competition to seize opportunities in any rapidly-changing, turbulent situation. Boyd’s breakthrough occurred when he conceptualized air battles as taking place in loops, where the pilots cycled through four steps–observe, orient, decide and act.

The cycle begins when a pilot observes the situation, including the hundreds of readings from the cockpit instruments and outside signals-the glint of sunlight from an upturned wing or an unexpected vibration. The bubble canopy expanded the Sabre pilots’ vista and allowed them to form a more expansive view of the unfolding situation. In the second step, the pilot oriented himself by forming