What is the primary purpose of a lessons learned session?

Correct answer: Document what went well, what could be improved, and capture knowledge for future projects

Option C is correct because a lessons learned session is a formal closeout activity that captures what went well, what should be improved, and institutional knowledge so that future projects benefit from the team's experience, aligning with PMI's process for organizational process assets. Option A is wrong because assigning final project costs is a financial closeout activity handled through cost accounting and the project management information system, not the purpose of a lessons learned session. Option B is wrong because project profitability is an evaluation typically conducted by finance or the sponsoring organization, not the intent of a lessons learned meeting. Option D is wrong because performance management and personnel decisions are HR matters separate from the knowledge-capture objective of lessons learned.