Something I learned from working on run crew in a technical theatre capacity: you can’t ever trust actors to do something. You basically have to set up complex tasks in the simplest, most direct way possible, and eliminate - from jump - any aspects of something which someone is likely to get hung up on. Which isn’t to say that actors are incompetent (though some certainly are), so much as it is to frame the simple point that an actor is evaluating a stage area and the objects on it from a different perspective than the person who built them, who loaded them on stage and who knows how they work inside and out. Actors also have to deal with simple perceptual flip-flops as well, like being on stage in bright lights one second to suddenly being in a completely dark backstage environment. That thing you told them a hundred times NOT to trip on? They WILL trip on it until you simply move it, remove it or rethink it entirely. And it becomes not their fault (or not as much, I guess) at a certain point, but your fault as a theatre technician. Your job is to establish a scenario in which the people you’re working with simply cannot fail.