When does the lessons learned document is updated?

Updating lessons learned only during planning ignores valuable insights gained during execution, monitoring and controlling, and closing.

Limiting updates to the execution phase misses critical reflections from planning decisions and final outcome evaluations in the closing phase.

While the closing phase includes a formal lessons learned review, waiting until closing means real-time insights from earlier phases are likely lost or forgotten by the time they are documented.

According to PMI's PMBOK Guide, lessons learned are identified, documented, and updated throughout all phases of the project lifecycle - from initiation through closing. Capturing them continuously ensures insights from early phases can inform later phases, preventing knowledge loss. Restricting documentation to a single phase results in incomplete records and forgotten details.