In broad terms, military readiness is defined by a unit's ability to carry out what it was designed to do, and what it is being asked to do. The criteria include the training of personnel, number of personnel, and equipment quality and quantity. Each branch measures differently based on its core mission, and the platforms and personnel types it has available to it. Increased training and new equipment improve readiness, while extended deployments without adequate rotation of units diminishes readiness. The complexity of determining readiness means there is a variety of opinions, ranging from it being a military-wide crisis to being in need of perennial adjustment and alignment. The bottom line, however, is that the task of maintaining and improving readiness is never complete.