We often use the term "post-mortem" to describe the stage that involves a sort of autopsy of a project in order to close it definitively. It entails developing a report and/or holding a meeting or teleconference, for example, allowing those involved to review the essential points of the project. This stage may also take place at the end of a series of related projects, if need be.
It should be noted that the purpose of a post-mortem is not simply to identify the problems that were encountered. Its main function consists of highlighting the solutions that were used to resolve these problems, the initiatives that deserve to be addressed, and any other factors that played a role in the completion of the project.
Apart from providing a post-analysis of the project, the report's purpose is to generate suggestions or recommendations for future projects. It therefore must be written in this spirit so that it may be useful for other projects and/or other project managers.