This is a comprehensive fact-finding mission to identify the cause of failures and comprises of site visits, interactions with personnel, documentation review. The gaps between the requirements and the actual conditions are plugged through the identification / recommendation of an array of corrective and preventive actions to avoid the recurrence of the incident.
Incident investigation basically is a 3-step activity viz.,
Fact finding – identify the timelines of failures
Analysis of failures using an option amongst available range of techniques.
Recommendations to implement corrective actions.