To determine the appropriate level of accident investigation you must consider the worst potential consequences of the adverse event. For example, a scaffolding collapse may not have caused any injuries but had the potential to cause major or fatal injuries.
Minimal Level
In a minimal-level investigation, the relevant supervisor will look into the circumstances of the event and try to learn any lessons which will prevent future occurrences.
Low Level
A low-level investigation will involve a short investigation by the relevant supervisor or line manager into the circumstances and immediate, underlying and root causes of the adverse event to prevent a recurrence and learn general lessons.
Medium Level
A medium-level investigation will involve a more detailed investigation by the relevant supervisor, line manager, health and safety adviser, and employee representatives. It will look for the immediate, underlying and root causes.
High Level
A high-level investigation will involve a team-based investigation involving supervisors or line managers, health and safety advisers and employee representatives. It will be carried out under the supervision of senior management or directors. It will look for the immediate, underlying, and root causes.
When dealing with adverse events, it is crucial to consider the worst potential consequences that could have arisen from the situation. In addition, it’s essential to remember that even if an incident did not cause any injuries, it might still have had the potential to cause significant harm or even fatalities. In such situations, it is vital to conduct a thorough investigation to identify the root cause and prevent similar events from occurring in the future.