A highly skilled team member accepted another job and will soon leave the project. What should the project manager do to sustain project performance while onboarding a new team member?

Providing cross-training and mentoring for the new team member is the most effective way to sustain project performance. Cross-training existing team members on the departing member's tasks ensures knowledge transfer and continuity, preventing a performance dip. Mentoring the new team member by an experienced colleague accelerates their integration and skill development. Sharing project documents is a necessary step but insufficient on its own for full integration and performance. Motivating the new team member is always good practice but doesn't address the immediate knowledge gap. Logging a risk is appropriate, but the action of cross-training and mentoring is the direct mitigation strategy, not just logging the risk.