Actually the EUA algorithm fascinates me. i am searching the NW forum and have found some informative posts from the past ( and still working on it...) using the search string "EUA" (not the best choice but works)

NWA's Protocol For Discount Ticket Elite Upgrades effective May 10, 2004

What is the upgrade order within an elite level?

EUA algorithms

Flight Availability Tool

and plenty more .....

I also posted about a hypothetical scenario here but i guess its not the right thread for it...

Bottomline good information on it exists ..... we just dont have the whole algo right infront of us...maybe someone can write it and make it a sticky because "EUA" and "upgrade" are the most common words used in the NW forum


Edit: themicah's post actually answers my question here