There is a pretty lengthy disclaimer at the start of this document that I think explains it best. This document is mainly directed at individuals who are in the 2:00 range though it may be useful to anyone under 2:10, I believe. There are also routes for the other categories that are in development.

https://docs.google.com/spreadsheets/d/1TmxtXCs99UZTZAATh27923APWCg5d8Dg2Tq5Y5EORvE/edit?usp=sharing