Reversionary Method of Operation?
One of the areas I like to discuss when with clients is the concept of having a reversionary method of operation.
In short, how do you still continue to provide your key mission items when your supporting tools have broken.
If you have a business method that is so hell bent on nothing failing, then you really should have a method of working that allows you to follow processes and procedures without those tools being available for a period of time.
MTTR and RTO are all well and good, until you have not managed to get back online.
Considering the primary role of a Hospital/ICU/ECU etc. is to provide life saving care, then surely this facility should still be able to take on patients and provide life saving care without a computer?
We're hardly in the realm of Tricorder's (Start Trek) futuristic health care. Medical support staff, Surgeons, Nurses, Specialists and Doctors can work without a computer I'm sure as that's not how they generally deliver their expertise skills is it?
Fully agree with the other posters comments about the complexity of running a facility like a hospital goes way beyond just accepting patients, however, in the absence of robust security postures that minimise the likelihood of this type of event, then turning away patients is a quite severe course of action.