ICS is designed to?

ICS is designed to provide a standardized approach to the command, control, and coordination of on-scene incident management, enabling a common hierarchy within which personnel from multiple organizations can work effectively.

This system includes five major functional areas: Command, Operations, Planning, Logistics, and Finance/Administration, which are staffed as needed for a given incident, ensuring that all aspects of incident management are covered comprehensively.

Source: https://training.fema.gov/emiweb/is/is700b/handouts/national_incident_management%20system_third%20edition_october_2017.pdf