Here, INT = Integer function which is essentially truncating all decimals of a number. I also believe this is what the Devs initially conceived. I based my formula on the data given by Kai Heilos under Smithing Calculation section, Archive 1. Anyways, here's a much more elegant formula than the current one. I can't believe that it's been more than 1 year since Skyrim was launched and the Smithing formula is still pending. 22 Ancient Knowledge changes the effective skill formula.