Explanation
According to the PMBOK Guide, project resource management involves the processes of planning, acquiring, developing, managing, and controlling project resources. The project manager is responsible for ensuring that the project team members have the necessary skills, knowledge, and abilities to perform their assigned tasks. One of the tools and techniques for developing the project team is training, which includes formal or informal learning activities to enhance the competencies of the team members. The project manager should assign an experienced resource to support the team member who is having difficulty with the new system, and provide them with the appropriate training to help them understand and use the system effectively.
This will help the project manager to improve the team member's performance, reduce the risk of delay, and increase the quality of the deliverables. References:
PMBOK Guide, Sixth Edition, Chapter 9: Project Resource Management, pp. 313-360.
PMP Exam Prep Coursebook, Chapter 9: Project Resource Management, pp. 9-1 - 9-16.