Which statement about the lessons learned register after project completion is true?

• A. Archive final invoices for audit.
• B. Schedule post-project closure meetings.
• C. Document personnel attendance.
• D. Capture knowledge gained to improve future work and avoid repeating mistakes.

Answer: (D)

Capturing what was learned to inform future work is the central purpose of the lessons learned register after project completion. It records what went well and what didn’t, why those outcomes happened, and recommended changes to processes, tools, and practices. This creates a knowledge resource that organizations can draw on to plan and execute future projects more effectively, helping to avoid repeating mistakes and to replicate successful approaches. For example, if a delay occurred because supplier onboarding was too slow, the lesson would note the need to tighten timelines and standardize communication early in the procurement phase. Other options describe tasks like archiving invoices or documenting attendance, or focus on closure activities rather than capturing insights to improve future work.