Why ICS Exists
The Incident Command System provides a standard structure for managing emergencies of any size. It reduces confusion by creating clear roles, common terminology, and a defined chain of command. ICS is a component of NIMS, the National Incident Management System.
Core Structure
The Incident Commander oversees the entire response and is supported by the command staff for safety, liaison, and public information. The general staff includes Operations, Planning, Logistics, and Finance and Administration sections. Each person reports to only one supervisor, known as unity of command.
Key Principles
Span of control is typically 3 to 7 subordinates, with 5 being ideal. Use plain language instead of codes, and keep a clear incident action plan. The structure expands and contracts as the incident grows or winds down.