Hi Bob,
You are right in that there are a great many variables to be considered - many of them either unique to our own organisations, or of differing importance.
I feel though, that you may have missed the point. The purpose is NOT to look for a reason to reduce PPM's, rather to objectively assess the relative risks involved to determine MAINTENANCE priority in a resource constrained world.
User training/familiarity is an important issue, but it is separate from maintenance requirement, and should not be confused (even though there is a clear link).
I will send a copy of my presentation to that old sage Louis (he does the harmonies by the way :-))
to elicit his considered opinion + would be happy to dissemminate more widely after that.
Regards
Paul
