What is one of the main goals of lockdown procedures during an active shooter event?

The main goal of lockdown procedures during an active shooter event is to prevent access to the building. Lockdown procedures are designed to enhance the safety of individuals by restricting movement in and out of the area, making it more difficult for a potential shooter to enter and harm those inside. By securing all entrances and ensuring that individuals remain within safe spaces, the risk to life is significantly reduced.

During such critical situations, it's essential for doors to remain secured to deny access to unauthorized individuals. This strategy not only protects those inside but also allows law enforcement to respond more effectively by managing the situation in a controlled environment. Other factors such as encouraging communication and color codes for identifying occupied rooms are important but secondary to the primary goal of keeping the area secure against a potential threat.