Well, that's an easy one ... you start with a list (and build it up from there).
What have you got so far?
As you may know, there have been a few threads on here that have touched on this in the past. But none bore any real fruit, as far as I am aware.
ECRI gets mentioned from time to time; and of course there are a few companies (consultancies) here in the UK - MJM, Hiltron et al
- that would be no doubt happy to sell
you a set of specs.
Some of the WHO
stuff (guidelines) is pretty good. Also, be aware of what the MHRA
has to offer.
Other than that, I suspect that Neil might be looking for another project.