The servant leader approach is the most effective for empowering team members and facilitating collaboration. This approach focuses on the growth and well-being of people and the communities to which they belong. The servant leader shares power, puts the needs of others first, and helps people develop and perform as highly as possible. This is in line with the PMBOK guide's principles of project leadership and team management, which emphasize the importance of servant leadership in project management1.
References: The PMBOKGuide and the PMP Examination Content Outline discuss the role of the project manager in leading teams and the importance of servant leadership in project management2. The Professional in Business Analysis Reference Materials also highlight the significance of leadership approaches that focus on collaboration and empowerment3.