The theory behind it is in your starter colony you put lots of nurse bees from several hives into a single deep hive with water, pollen and honey. This is when you choose the hive you want to raise queens from and then put that frame of young eggs into it and all of the young nurse bees will produce the royal jelly to start the cells, but the population isnt enuff to finish them. Once the cells are started you put the cells into a finisher hive after a day. The finisher hive should be full blown with a queen excluder with the queen below obviously, and being in a full blown hive they do the best by keeping the temperature of the cells right along with feeding them continously for proper nurishment till their capped.This type of care seems to produce the largest queens with lots of ovaries. The larger the queen usually the more eggs she has to produce lots of brood. Well feed queens equals healthy egg producing queens!! I feel the best queens are raised in the spring when they are raising swarm cells, the population is full blown,lots of pollen, nectar and the cells get tons of attention this is the perfect time to do a split

or you could just let em swarm

. These cells are treated as queens from the start not converted over after a few days. The sooner they are treated as queen cells the better the queens are. So if you are looking to raise just a few queens and you have a good hive that is ready to swarm with queen cells. Remove all the cells except one and take the old queen out and split the hive. The queen cell will hatch out and become the new queen be sure to choose a large healthy looking cell. If you decide to let the hive choose its queen they could still swarm with virgin queens but if you have one cell they wont swarm being the only queen she will get mated and take over the hive. Be sure to check on the queen after 30 days to check for eggs this is what i do anyway not everyone may do the same. Chris