This is a topline picture of what you need to do to manage your hives over winter. To manage your colonies well you will need to adapt their natural patterns with your aims.
As bees don't hibernate in winter, each colony forms a cluster (a small rugby ball shape in the centre of the brood chamber) to generate heat and keep warm, so ensure honey and pollen stores are close to the cluster
Bees don’t usually succumb to the cold, they tend to starve to death, so feed if required
Ensure the hive has some ventilation if condensation starts to build up in the hive
Remove varroa treatment
Winter is a time to clean, repair and make up new equipment for Spring