readiness

“Mission capable” rates are a common measure of readiness ......
(ttp://www.airandspaceforces.com/fighter-mission-capable-rates-fell-in-2021/)

To start with and to keep things simple, we’ll define availability as a measure of a weapon system’s readiness to perform its mission.
In terms of aircraft readiness, a metric often used for availability is mission-capable (MC) rate.
(ttps://www.dau.edu/library/damag/march-april2019/heart-weapon-systems-availability)