How do you collect a swarm?

How do you effectively gather a swarm of people, or perhaps a swarm of bees, without causing chaos or harm? Is there a specific technique or methodology that you utilize to safely and efficiently collect a swarm, whether it's for scientific research, environmental conservation, or simply to relocate them to a more suitable location? Could you elaborate on the steps involved in the process, including any precautions or equipment needed to ensure the safety of both the swarm and those involved in the collection?