Readiness
Readiness (operational readiness) is the capability of a unit/formation, ship, weapon system, or equipment to perform the missions or functions for which it is organized or designed [jointchiefs2016dictionary].
Readiness is not a single number. It is a bundle of capacities and constraints shaped by personnel, training, maintenance, sustainment, and time. Readiness reporting also functions as governance: it influences budgets, deployments, and perceptions of risk.
References
[jointchiefs2016dictionary] Joint Chiefs of Staff. (2016). Department of Defense Dictionary of Military and Associated Terms. Joint Publication 1-02 (as amended through 15 Feb 2016).