March 2018 ICS Review Document
EXTRACTED FROM - E/L/G 0300
Intermediate Incident Command System for Expanding Incidents,
ICS 300
7
Every incident should have an action plan; however, not all incidents need written plans.
The necessity for written plans depends on incident complexity, command decisions,
and legal requirements. Formal IAPs are not always developed for the initial operational
period of no-notice incidents. However, if an incident is likely to extend beyond one
operational period, becomes more complex, or involves multiple jurisdictions and/or
agencies, preparing a written IAP becomes increasingly important to maintain unity of
effort and effective, efficient, and safe operations.
Staff in EOCs also typically conduct iterative planning and produce plans to guide their
activities during specified periods, though these are typically more strategic than IAPs.
Manageable Span of Control
Maintaining an appropriate span of control helps ensure an effective and efficient
incident management operation. It enables management to direct and supervise
subordinates and to communicate with and manage all resources under their control.
The type of incident, nature of the task, hazards and safety factors, experience of the
supervisor and subordinates, and communication access between the subordinates and
the supervisor are all factors that influence manageable span of control.
The optimal span of control for incident management is one supervisor to five
subordinates; however, effective incident management frequently necessitates ratios
significantly different from this. The 1:5 ratio is a guideline, and incident personnel use
their best judgment to determine the actual distribution of subordinates to supervisors
for a given incident or EOC activation.
Incident Facilities and Locations
Depending on the incident size and complexity, the Incident Commander, Unified
Command, and/or EOC director establish support facilities for a variety of purposes and
direct their identification and location based on the incident. Typical facilities include the
Incident Command Post (ICP), incident base, staging areas, camps, mass casualty
triage areas, points-of-distribution, and emergency shelters.
Comprehensive Resource Management
Resources include personnel, equipment, teams, supplies, and facilities available or
potentially available for assignment or allocation. Maintaining an accurate and up-to-
date inventory of resources is an essential component of incident management. Section
II, the Resource Management component of this document, describes this in more
detail.
Integrated Communications
Leadership at the incident level and in EOCs facilitates communication through the
development and use of a common communications plan, interoperable
communications processes, and systems that include voice and data links. Integrated