1. First, write clearly the working state before the incident, mainly the operation mode before the abnormality and the operation parameters of the system equipment.

2. Secondly, write the story of the incident, make it clear, make it clear, and strive to be clear and informative.

3, and then cause analysis, need to write the direct cause of the event.

4. Finally, write preventive measures, mainly based on the direct causes, indirect causes and exposed problems analyzed.