For me, it's kind of like when asked to give directions to somewhere that I've only ever been a passenger whilst getting to. I'll need something in writing to do it properly.
If someone else took it apart, I need notes, charts, or baggies.
If I took it apart, I made efforts to notice for instance: "one of the inner cover bolts was shorter than all the rest and that one was in the upper left corner.........."
I used to "apprentice" in a neighborhood Harley shop, and that guy would just fill boxes with parts and fasteners until they wouldn't hold anymore, then start another. Used to freak me out until I learned that he knew the "route" back to a running machine, so he didn't need a map.
That's not to say that I never separate fasteners by type in a magnetic tray or anything.....
And, I generally don't do major engine rebuilds or the like on my own.
Shane