Postmortem (noun)

1. A medical examination of a dead body to determine the cause of death.
2. An analysis or discussion that takes place after an event has ended, especially one that analyzes the causes of failure or death.

Origin:

From latin post mortem ('after death').

Examples:

1. The doctor ordered a postmortem to investigate the patient's death.
2. The coroner performed a postmortem and determined the cause of death to be poisoning.
3. The company conducted a postmortem of the failed product launch to identify the mistakes made.
4. The project team conducted a postmortem to review what went wrong and how to improve in the future.
5. The postmortem of the mission was conducted to determine the cause of the spacecraft failure.