When John Doe can see a code 4 noted on one PIR when exactly the same thing on a PIR carried out by another person is down as code 1, isn't he going to feel that the whole system is quite ridiculous? And doesn't he have a point?
Paul, I can't help but agree with this last paragraph.
The thing that bothers me about this "rating" system is the fact that it seems to be open to wild interpretation.
Two different inspectors may have totally opposing ideas on the same installation.
IMO, something either complies NOW or it doesn't.