Without knowing exactly the Starwars FFG system, the same problem (what complications to add for a roll) can be found in PbtA systems. There's an excellent guide that maybe can help although written originally for Dungeon World, to help finding consequences in the equivalent of a perception roll: https://docs.google.com/document/d/1MC_W_qxY7kScRK_2arLhGvATX0HyQz6dTIKFj_HI2T4/edit#!

Thanks! I've played some PbtA and FitD, and I'd like to see if other games have some sort of success/success with consequences/failure system. Seems there are some good recommendations!

Why I can't see your comment directly on my post? I really need to get used to this platform... Anyway thanks for that diagram! Pretty cool. But I meant apart than PbtA or FitD...