I say "mission critical" in so far as operations. A factory without proper wiring or no power is a very expensive thing. Not shipping out whatever your factory makes and holding up all those trucks is a very expensive thing. Fucking up your clients production lines is a very expensive thing.
So yeah, I'm sure your employer thinks keeping the lights on and the power flowing is "mission critical" to them.
It IS highly reliant on automation however and I have a decade of experience in maintaining automated equipment.
So yeah, I'm sure your employer thinks keeping the lights on and the power flowing is "mission critical" to them.