Next, let's consider what accidents we need to investigate. If they are to serve their purpose, you've got to know about them. All accidents with potential for injury. Every injury or illness entered on the OSHA Injury and Illness Log. How the investigation gets conducted is a matter of company policy and assigned responsibility.
Some companies call an accident investigation team for every incident.
In others, the safety director does the investigation. Sometimes, several people do an independent examination of the circumstances and all make entries on the investigation form. However it's done, two people really must be involved if at all possible. One is the injured or impacted employee. He or she can clear up a lot of confusion by telling what happened and why it occurred.