GlossaryEmergency management
Incident Command System
The Incident Command System (ICS) is a standardized way to organize management of an incident, including objectives, leadership, personnel, resources, and communications.
The Incident Command System (ICS) is a standardized way to organize management of an incident, including objectives, leadership, personnel, resources, and communications. Its structure can expand or contract with the work required. ICS describes an organizational framework, not a particular dispatch system, agency, building, or level of emergency severity.
What the structure does
FEMA's NIMS framework places ICS within the broader National Incident Management System. Common roles and terminology help people from different organizations work within an agreed structure. An organization chart can show responsibility for operations, planning, logistics, and financial or administrative work when those functions are activated.
A small incident does not need every possible position filled separately. Seeing an ICS role in a report therefore does not establish a large disaster. Likewise, an expanding chart can reflect increased coordination needs without changing an incident's legal status.
Example
Hypothetical example: A local flood response begins with a single incident commander. As several neighborhoods are affected, additional personnel take responsibility for planning and logistics, while the command structure retains common objectives.
The example describes an organization growing with the incident. It does not mean new departments have been created or that the jurisdiction's normal legal responsibilities have disappeared. The incident organization assigns work for the response.
Common confusion
ICS is one component of NIMS, which also addresses broader resource management and coordination. An emergency operations center supports coordination and resources; it is not automatically the on-scene command post.
A computer-aided dispatch platform can support operations without being the Incident Command System itself.
Reading local records
Use the dated organization chart, incident action plan, and local emergency plan to identify who held each role. A job title in an employee directory may differ from that person's incident assignment. Do not infer tactical actions or legal authority from a chart alone.