FUNDAMENTALS OF MY SYSTEM
(1) Bees above a queen excluder, with the queen below, consider themselves queenless. To prove this, take any strong colony and move eggs and brood above the excluder, and they will proceed (during a honey flow) to build one or more queen cells and allow them to hatch out.
(2) The nurse bees that feed the young worker larva are the bees needed to start and finish queen cells. The bees drawing out comb and storing honey are not the bees for this job.
The simplest way, with the least disturbance to the colony, to get the nurse bees in a queenless state and to segregate them from the field workers and wax builders
, is to move the eggs and unsealed brood above the excluder far enough in advance[*] so that these nurse bees will segregate themselves.