My style of hive management is relaxed. I start fall feeding when I see the workers killing the drones.
Drones are male bees created from unfertilized eggs. There are between 500 and 1,000 drones in a typical hive of 50,000 – 60,000 bees. A drone's only job is to fly out and search for virgin queens. The luckiest, or unluckiest depending on your perspective, die immediately after mating. It's a good news, bad news, scenario.
Drones are useless to the hive. They don't clean cells, care for the young, gather pollen and nectar, sting, or fan the hive in hot weather. The don't do anything. Drones are larger than workers and steal large quantities of stored food.
So, in the fall, the workers kick them out. They tear the drones wings by pushing and pulling them out of the hive. It's a vicious attack and a violent end to self-serving freeloaders. The workers line up at the entrance to form a barricade against the drone's re-entry. Without the hive's protection the drones die.
For these reasons I don't feed the hive too early in the season. I let the workers do their job first. Otherwise the drones will eat the stored honey, pollen patties, and sugar-water. By waiting I have a reasonable assurance that there will be enough food for the hive to survive through the winter.