It looks like a nice procedure, but it could be challenged. For instance, what if (just suppose) the failure was due to the kit not being looked at (serviced) for five years? If the investigation is carried out by the Biomed Manager, how would you defend against possible accusations of "cover up"?
... conclusion, if the equipment passes the tests then say so ...
... and, if it doesn't? Say so as well, I guess.
And (just suppose) if "operator error" was indeed the root of the problem, who decides about that?
Or do these things get swept under the carpet, in order to protect reputations? If so, how can "lessons be learned"?
Dare I ask ... what about the patient?

Bottom line:- where is the Official Procedure (MHRA, or whatever)?