With regards to your second post, George ... in well-organised establishments, the requirement for user staff to
report faults has been normal practice (and, in some cases these days, a legal requirement) for as long as I can remember!
So, for what it's worth, here is my own contribution (advice to users):-
1) Make friends with the biomeds
2) Read the manual
3) Understand what you're doing
4) Report faults
OK ... let's get some *posters made!

And in similar vein, and with regards to "NPF" situations, here is a thought for the biomeds:-
Listen carefully to users complaints regarding failures. Separate, but don't discount their idea of cause and effect. Have them explain the symptom (by gentle coaxing, if need be).
*
I almost added:- "Keep Calm and Carry On"! That 1939 poster seems to be cropping up all over the place these days. A sad indication of our present predicament, perhaps.