I'll defend my lengthy description and method by saying I'm a teacher and try to explain things so that others gain an understanding of a concept.
I think your method and concept is very sound, but also speaking as a teacher I think such methods have their place for normally exposed/developed film and for those with a great deal of patience. However, they do not always fit in with the variation of student and their experience, or those dyslexic to numbers. Students new to film will often produce extremely thin under exposed films, or ones that are partially fogged, or extremely dense. In such cases advice to get the best out of what they have quickly can often save demotivation about their thoughts on film and printing in general, so they may live to fight another day and improve.