What must be created first for incident managers to send a broadcast alert?

To enable incident managers to send a broadcast alert, it is essential to first establish a broadcast topic. This broadcast topic serves as a defined channel or subject matter around which alerts can be structured and communicated. By creating the broadcast topic first, incident managers ensure that the messages they send are categorized and appropriately directed to the relevant audience, enhancing the clarity and effectiveness of the communication.

Without a broadcast topic, there would be no designated framework for sending alerts, which could lead to confusion and miscommunication among team members. The broadcast topic acts as a foundation, facilitating organized information dissemination during an incident.

The other options, while relevant to aspects of incident management, do not support the specific function of initiating a broadcast alert on their own. A user list could identify the recipients, an incident report could detail specific events or issues, and a notification preference could inform how individuals wish to receive alerts. However, none of these elements would allow for the initiation of alerts without first establishing the context provided by a broadcast topic.