Also software engineers: be sure not to fire Ned or else the whole bridge might collapse
So your patient might be ok if you fire Ned, but if you try to make changes and a critical system goes down, it might take you a lot longer to fix things without the specialists in that system.
You could keep one specialist around for each system, but then you have a very small bus factor.
Software engineers: We did document he was a load-bearing Ned. He was Ops, of course he doesn't code regularly.
Look at all the other major engineering failures in history, it’s always small things (a gasket) on a bad day (too cold?) that somehow works day after day until one day it magically doesn’t and you get the Apollo incident. Everything goes catastrophic over tiny things. Imagine if NASA fired half their team before that incident. The only guy who knew the gasket can’t get cold might not still be there because Ned got laid off.