Final answer:
The main purpose of an incident investigation is to find out the causes of an incident and correct them to prevent future occurrences.
Step-by-step explanation:
The purpose of an incident investigation is primarily to determine why an incident occurred, in order to correct any problems or factors that led to the incident. By understanding the root causes, organizations can implement changes to prevent similar incidents from happening in the future. It's not solely about finding the person responsible, satisfying government requirements, or addressing insurance premiums, although these might be secondary considerations.