Requirement for Roles
Member roles on an incident are used to allow you to keep track of who initiates command, who takes operations and who performs various roles.
NOTE: Command (Incident Command) role is used to set the NFIRS "Officer In Charge" information. At a bare minimum, set the Command role.
Typically the incident commander (wether Chief or most senior firefighter on scene) is responsible for ensuring a proper and complete incident report, so recording "Command" role allows administration to identify who "owns" each report.
For department benefit, include additional roles to allow a record of who performed what role on an incident, and insights into who is performing roles over time. Have new recruits had opportunity to be coached in roles, e.g. performing side-by-side command with a senior firefighter or officer? Do the same people do command each time?