As these examples show, "readiness" is used both in a narrow sense to discuss the military's current level of training and the status of its maintenance, and in a broader sense to describe the military's overall capability, which includes how large the force should be and what kinds of weapons it should have, even if those changes will not take effect for several years. What should the U.S. military be ready for? How does the FY2018 budget request affect the U.S. military's readiness? While this report discusses how differing uses of the term readiness affect the debate, it does not evaluate the current state of the U.S. military's readiness or provide a conclusive definition of readiness. Background

		Two Principal Uses

Despite many definitions of readiness, CRS has identified two principal uses of the term. One, readiness has been used to refer in a broad sense to whether U.S. military forces are able to do what the nation asks of them. In this sense, readiness encompasses almost every aspect of the military. Two, readiness has also been cast more narrowly as only one component of what makes military forces capable. In this sense, readiness is parallel with other aspects of the military, like force structure and modernization (which usually refer, respectively, to the size of the military and the sophistication of its weaponry). These attempts to clarify the term "readiness" acknowledge that both uses embody accepted concepts: the broader use capturing the military's ability to accomplish its overall goals and the narrower use capturing the military's ability when its size and type of weaponry are held steady. O&M as an entire appropriations title, however, may not be the best way to measure readiness in the narrow sense. Significance for Congress

		Readiness as DOD's Justification for More Resources

How the term readiness is used is important to Congress because DOD has made readiness central in its justifications for increased funding. Issues for Congress

		Is There a Readiness Crisis? Whether observers see a readiness crisis often depends on whether they are using readiness in its broad or narrow sense. The two uses, however, are not the only reasons observers disagree over whether there is a readiness crisis. In the passage, therefore, General Milley assesses the U.S. Army as ready in the narrow sense even as he expresses concern it is not ready in the broad sense. Whether the military is ready in the broad sense depends on what the military should be ready for, and cannot be answered by describing readiness in the narrow sense. At the same time, readiness is used in differing ways that cloud the debate on how ready the military is and what steps would make it more ready. Used this way—describing the readiness of the medical forces themselves—medical readiness is still a sub-component of the narrow sense of readiness, but one that is interdependent with other components of the broader sense of readiness.
Many defense observers and government officials, including some Members of Congress, are concerned that the U.S. military faces a readiness crisis. The Department of Defense has used readiness as a central justification for its FY2017 and FY2018 funding requests. Yet what makes the U.S. military ready is debated.
This report explains how differing uses of the term readiness cloud the debate on whether a readiness crisis exists and, if so, what funding effort would best address it.
CRS has identified two principal uses of the term readiness. One, readiness is used in a broad sense to describe whether military forces are able to do what the nation asks of them. In this sense, readiness encompasses almost every aspect of the military. Two, readiness is used more narrowly to mean only one component of what makes military forces able. In this second sense, readiness is parallel to other military considerations, like force structure and modernization, which usually refer to the size of the military and the sophistication of its weaponry. Both uses embody accepted concepts: the broader use capturing the military's ability to accomplish its overall goals and the narrower use capturing the military's ability when its size and type of weaponry are held steady.
These two senses of the term are interdependent. Today, most observers assume the military should be as ready as possible in the narrow sense, but in past eras some favored accepting lower readiness in a narrow sense in order to redirect resources in ways they felt improved the military's readiness in the broad sense (to include funding a larger force or newer equipment).
Use of either sense of readiness affects Congress's evaluation of certain key issues:
Is there a readiness crisis? Most observers who see a crisis tend to use readiness in a broad sense, asserting the U.S. military is not prepared for the challenges it faces largely because of its size or the sophistication of its weapons. Most observers who do not see a crisis tend to use readiness in a narrow sense, assessing only the state of training and the status of current equipment. For what scenarios, contingencies, and threats should the U.S. military be ready? Some senior officials express confidence in the military's readiness for the missions it is executing today—although other observers are not as confident—but express concern over the military's readiness for potential missions in the future. How is readiness measured? Because of the two uses of the term, measuring readiness is difficult; despite ongoing efforts, many observers do not find DOD's readiness reporting useful. How might DOD's FY2018 budget request improve readiness? DOD's request increases operating accounts more than procurement accounts. If readiness is used in a narrow sense, these funding increases may be the best way to improve the military's readiness. If readiness is used in a broader sense, that funding may not be sufficient, or at least the best way to improve readiness.