Which element is not included in the investigation of an accident?

The extent of injury is not typically a focus of an accident investigation in terms of understanding the causative factors or preventing future occurrences. Accident investigations are primarily concerned with identifying the root causes of the incident to implement measures that enhance safety and mitigate risks.

Investigators look at unsafe conditions—such as equipment failure or hazardous environment—that may have contributed to the accident. They also examine unsafe acts, which pertain to behaviors or actions taken by individuals that may have led to the incident. Additionally, understanding the type of accident helps categorize the incident and facilitates comparative analysis with similar events, aiding in comprehensive safety evaluations.

Focusing on the extent of injury, while important for post-incident response and worker compensation considerations, does not contribute directly to understanding how the accident occurred or how to prevent similar situations in the future. This is why it is not included as a primary element in the investigative process.