Understanding the OODA loop enables a commander to compress time - that is, the time between observing a situation and taking an action. A commander can use the temporal discrepancy (a form of fast transient) to select the least-expected action rather than what is predicted to be the most effective action. The enemy can also figure out what might be the most effective. To take the least-expected action disorients the enemy. It causes him to pause, wonder, to question.