An Incident Roster is the main roster that contains all responders who can potentially be involved in incident response efforts. When you create an incident, you should always set up its roster. You can add any qualified responders to an incident roster.
Location Rosters are subsets of an incident roster that help you assign responders to specific locations within an incident. If a responder is assigned to more than one location, he or she can be expected to work at multiple locations during the incident.
Each location associated with an incident should have a roster. These rosters can be exported and sent to on-scene officers.
Assigning responders to a location roster also allows you or an on-scene officer to track the time responders spend at a location by using the Time & Attendance page.