mission-critical

comparative more mission-critical · superlative most mission-critical

1. Of a process or part within a larger system, vital to the operations of the system as a whole.

   The LCACs role makes good communications a mission-critical feature.

   1996, Tom Clancy, Marine: A Guided Tour of a Marine Expeditionary Unit, page 189

   2 more examples

   Let me remind you here that a less-than-sixty-second, fun-to-use general-reference filing system within arm's reach of where you sit is a mission-critical component of full implementation of this methodology.

   2002, David Allen, Getting Things Done: The Art of Stress-Free Productivity, page 128

   Cooling is an often underappreciated but a mission-critical part of the computer system.

   2011, Benjamin Patrick Conry, 31 Days Before Your CompTIA A+ Exams, page 13