@Paul: accredited? By whom, may I ask?

@E.A.: yes, of course the information in the service manual must be considered, and it is often all you will ever need. But (as we all know) quality can be a bit
patchy (and sometimes even non-existent). I should imagine that Paul is trying to apply a level of standardisation across the board. That is:- a Quality and consistent procedure for each and every piece of kit, and not just for some.
I have seen quite comprehensive sets of internally developed PM procedures at various hospitals in the UK (based upon manufacturers' recommendations, local experience, and any or all other credible sources) - and have even found some of them well OTT (in my opinion). But I have always wondered why these aren't shared across the whole of the NHS. With a bit of "peer review" surely such efforts could be refined into
de facto PM procedures of choice (they would even have an economic value as well, I would have thought)!
@Neil: to be honest, the fire tender is usually impressively (and dramatically) quick to turn up every time someone burns the toast (which sets off the alarm, of course).

They even came stomping in once when a transformer went up in smoke at the back of a wall-mounted Kontron monitor on one of the wards. I always wondered how they got to hear about it before I did!
Note that I'm talking about London hospitals here, rather than those out in the desert where, yes, even the "Civil Defence" were a bit inshallah in their reactions.