match calculation formula


I was wondering how often do the moderators of this game change the aglorithm responsible for the results of the matches.

Did the match result calculation formula change?


I presume that there's a calculation formula/software used, taking into consideration variable values (e.g players attributes, squad value, fitness values e.t.c.)
My question was: How often do the moderators change this formula/software? Has it been changed recently?