ICS was developed with the knowledge that each person can effectively supervise 3-7 people, depending upon the situation. It might include staff positions such as Safety, Liaison, and Information. Communication Common vocabulary is essential in any emergency response, especially when diverse agencies are involved. Agencies often have a slightly different meaning for terms that can lead to confusion or even loss of life or property. The ICS structure and vocabulary eliminates confusion by providing predefined functions and terms.
Safety Responding to emergencies can be hazardous.
Incidents that threaten citizens also threaten the people responding. ICS establishes clear lines of communications to inform respondents of changing, and unsafe situations, and changes in goals. Changes must be properly managed, and usually with limited resources. Freelancing is a safety risk that should be avoided. Freelancers are people who aren't assigned to a task and decide to work wherever they chose, without supervision.