While the broccoli cooks, the grilled chicken no longer sits bare on the edge of the stove. The cook sets it on its tray on the nearest free counter, sautés the broccoli, then comes back for the tray and finishes the plate.
A cook no longer stands waiting because someone is at the stove. The stove has four burners, so they light theirs, put a pot on or ladle soup from the square beside the cook already there.
Pots are smaller, so each one fits its own burner.
CHEF!