I can tell you what we do but you'd have to ask Ken Snow how he does his splits.
Lead tech pretty much picks and choses what he wants to do, he has total responsibility for his assistant and the job. The lead tech knocks on the door and greets homeowner, assistant has vacuum & spotting tray in hand. Lead tech does walk through while assistant vacuums. Lead tech sets up unit as assistant sets out blocks and sticky tabs. Lead presprays carpet, assistant moves furniture to middle of the room, the lead cleans behind and the assistant moves back and places blocks and tabs. Lead cleans open and assistant rakes or applys protectant and rakes. Lead meanwhile makes out invoice and collects.
The idea is for the lead tech to clean and when winded trade positions with his assistant BUT Lead tech's have trouble doing so. KMA! It's the ole carpet cleaning curse, "no one can clean better than I". eat shit!