The power (with its backups) will never fail so we don't plan for it.
I guess it is just a blinkered approach. You convince yourself that the power will be fine and so you ignore the case when there is a failure, hence chaos when the system that will never fail actually fails. Is it the MDs fault? Yes for hiring an incompetent IT Manager. But I'd replace the IT Manager when the dust has settled. But are those crucial nuggets of information that he has in his head backed up?
Biting the hand that feeds IT
