What is a system that provides instructions to building occupants during an emergency called?

A voice evacuation system is specifically designed to communicate emergency instructions to building occupants in clear and intelligible language. This system typically utilizes pre-recorded messages or live announcements to guide people on what actions to take during an emergency, such as evacuating the premises or moving to a safe location. The effectiveness of a voice evacuation system lies in its ability to provide timely and relevant information, ensuring that occupants can respond appropriately under stress.

In contrast, the other options serve different purposes. An emergency alert system may send alerts but doesn't usually provide direct instructions to occupants within a building. A building management system, while critical for overall building operations, focuses on monitoring and controlling services like heating, lighting, and security, rather than emergency communication. A fire command system mainly pertains to fire alarm functions and may monitor alarms but does not directly provide real-time instructions to occupants. Therefore, the unique role of a voice evacuation system in delivering clear guidance during emergencies makes it the correct choice.