The correct answer is B . Lessons learned should be captured, compiled, formalized, and stored. Lessons learned are a structured form of organizational knowledge that helps current and future projects improve performance and avoid repeated mistakes. They should capture what was planned, what actually happened, why variances occurred, what worked well, what failed, what actions were effective, and what recommendations should be reused or avoided. Option A is incorrect because lessons learned should not describe only what happened; they should also compare actual performance against the plan and examine causes, effects, and improvement opportunities. Option C is also incorrect because lessons should not be used only after all project activities are complete. They can and should be captured throughout the project so that the team can apply learning immediately where useful. At closure, they are consolidated and stored for future use. PMBOK recognizes a lessons learned register as a project document that records knowledge gained during a project and supports future performance improvement. The uploaded question set identifies capture, compilation, formalization, and storage as the correct statement.
Reference topics: lessons learned, knowledge management, formalization, storage, continuous improvement, project closure.
