Observing the pit crew, the GOSH doctors noted the value of process mapping, process description, and trying to work out what people’s tasks should be.
The lollipop man is the one who waves the car in and coordinates the pit stop. He maintains overall situation awareness during the pit stop. In the old hospital handover there was no one like the lollipop man so it was unclear who was in charge.
https://kottke.org/25/12/how-ferraris-f1-team-improved-medical-care-for-children