A team member encounters a technical issue that was handled in a recently closed project but is unaware of that prior work and wants to solve it independently. What should the project manager do?

Sharing the lessons learned from the previous project with the team member is the most effective and efficient solution. This directly addresses the team member's lack of awareness about prior work, preventing redundant effort and leveraging existing organizational knowledge. Contacting the previous project's manager for help is an indirect approach; the lessons learned repository is the primary source for this information. Letting the team member work through the issue independently wastes time and resources, as a solution already exists. Strengthening the risk management approach and monitoring is a proactive measure for future projects but doesn't resolve the immediate issue of the team member's current problem.