What type of size-up is employed to evaluate the potential of an occupant being alive in an IDLH environment?

• A. Personnel accountability
• B. On-scene occupant services
• C. Victim survivability profiling
• D. Crew resource management

Answer: (C)

Victim survivability profiling is the size-up approach that focuses on whether occupants are still likely to be alive in an IDLH environment. It involves quickly assessing conditions such as time elapsed, heat, visibility, smoke production, fire behavior, location of occupants, and other life-sustaining factors to judge if a rescue is feasible and where to prioritize search and rescue efforts. This type of sizing-up directly informs whether crews should push in for a lifesaving search or shift to defensive operations.

Other terms describe different aspects of incident management. Personnel accountability is about tracking where responders are and ensuring everyone is accounted for. On-scene occupant services refers to actions like evacuations, triage, and initial care for occupants. Crew resource management focuses on teamwork, communication, and decision-making among the incident team.