A project team member, who is inexperienced in system development work is not performing well.

The best course of action in this scenario is to assess the team member’s development needs and provide the necessary training. This aligns with the PMP’s focus on developing competencies and the PMBOK Guide’s emphasis on project team development as a part of project human resource management. The PMBOK Guide highlights the importance of developing the project team to improve knowledge, skills, and interaction, which contributes to overall project performance. Training can enhance the team member’s skills, making them more effective in their role and contributing to the project’s success.