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Incident Investigation

Incident Investigation - Photo Credit: OSHA | Copyright: OSHA-construction incidents
Incident Investigation Menu

Overview

OSHA strongly encourages employers to investigate all incidents in which a worker was hurt, as well as close calls (sometimes called "near misses"), in which a worker might have been hurt if the circumstances had been slightly different.

In the past, the term "accident" was often used when referring to an unplanned, unwanted event. To many, "accident" suggests an event that was random, and could not have been prevented. Since nearly all worksite fatalities, injuries, and illnesses are preventable, OSHA suggests using the term "incident" investigation.

Investigating a Worksite Incident

Investigating a worksite incident— a fatality, injury, illness, or close call— provides employers and workers the opportunity to identify hazards in their operations and shortcomings in their safety and health programs. Most importantly, it enables employers and workers to identify and implement the corrective actions necessary to prevent future incidents.

Incident investigations that focus on identifying and correcting root causes, not on finding fault or blame, also improve workplace morale and increase productivity, by demonstrating an employer’s commitment to a safe and healthful workplace.

Incident investigations are often conducted by a supervisor, but to be most effective, these investigations should include managers and employees working together, since each bring different knowledge, understanding and perspectives to the investigation.

In conducting an incident investigation, the team must look beyond the immediate causes of an incident. It is far too easy, and often misleading, to conclude that carelessness or failure to follow a procedure alone was the cause of an incident. To do so fails to discover the underlying or root causes of the incident, and therefore fails to identify the systemic changes and measures needed to prevent future incidents. When a shortcoming is identified, it is important to ask why it existed and why it was not previously addressed.

For example:

  • If a procedure or safety rule was not followed, why was the procedure or rule not followed?
  • Did production pressures play a role, and, if so, why were production pressures permitted to jeopardize safety?
  • Was the procedure out-of-date or safety training inadequate? If so, why had the problem not been previously identified, or, if it had been identified, why had it not been addressed?

These examples illustrate that it is essential to discover and correct all the factors contributing to an incident, which nearly always involve equipment, procedural, training, and other safety and health program deficiencie.

Addressing underlying or root causes is necessary to truly understand why an incident occurred, to develop truly effective corrective actions, and to minimize or eliminate serious consequences from similar future incidents.

Additional Resources

To assist employers and workers in conducting effective incident investigations, and to develop corrective action plans, the following resources can help:

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