I have always said that at the interview to hire Schedulers for the fracs .. they ought to just get a class of about 30 people and toss them all a Rubik's Cube. That ought to be the test.
Then stage 2. To the survivors of the first Rubik's cube ... toss out cubes that have the colors change on individual squares every 10 minutes. then see who can keep re-solving the puzzle for an 8 hour shift. :laugh:
I would just peel off all the stickers (they remove fairly easily) and put them back as appropriate. Think smarter, not harder.