wow nice calculation.

So is this saying that for ANY item you RE, it increase the chance of getting schematic?

Each time you RE an item, there's a 20%(10%) chance that you'll get the improved schematic. Cumulatively, it becomes more and more likely that you'll have the schematic, but that doesn't increase the chance that it'll pop up this particular time. Sometimes you'll make twenty-four attempts to RE a particular piece of Armouring, still not have it, but it's still only a 20% chance that the next attempt will get it. And sometimes you'll get two in a row, like I did REing a particular type of helmet yesterday.