ObAnecdote: Prof for a software engineering class I took used to work on military grade systems. She told us of one demo they gave of some equipment (some sort of avionics system, I want to say) that was supposed to be very fault tolerant (redundant components, etc). Before they started, one of the observing colonels or generals said "Hold on a second" and went up to the demo unit, popped it open, and plucked out a CPU. Fortunately for them, it worked as designed.

Needless to say, that's definitely a few steps beyond even "enterprise".