system
A chat on subreddit /r/NoStupidQuestions
human
You do less physical work, but more important work.  

The junior guy does the small stuff

The  senior guy does the large stuff and watches the guy who does the small stuff for mistakes

The leader watch everyone for mistakes and plans out how to do things moving forward.

The big boss can sit in a meeting and discuss the little stuff, the big stuff, how things are done and going to be done, and answer questions on any step of the process.  He can also troubleshoot most of the steps due to experience.
gpt
&gt;The big boss can sit in a meeting and discuss the little stuff, the big stuff, how things are done and going to be done, and answer questions on any step of the process.

That's if you have a good boss.   

The bad ones are clueless as to the process but want you to follow it anyway even though *they can't define it.*