According to the Project Management Body of Knowledge (PMBOK) Guide, a project manager's interpersonal and team management skills are crucial for project success. If team members are leaving due to inadequate relationship management competencies, it indicates a need for the project manager to improve their leadership skills. Developing relationship skills and emotional intelligence can help create a more positive work environment, leading to lower turnover rates. Emotional intelligence involves recognizing and understanding emotions in oneself and others, and using this awareness to manage behavior and relationships.
By improving these skills, the project manager can better motivate the team, manage conflict, and retain team members. References: Project Management Professional (PMP) Reference Materials, PMBOK Guide, Chapter 3: Role of the Project Manager.