When an interviewer asks this question, what they really want to know is if you're an effective leader. They are trying to find out if you have the skills and competencies required to put a team together, manage the team, and see a project through to completion. What type of team members will you recruit? Can you work with people that are different than yourself? Can you motivate and inspire everyone from support staff to senior managers? The answer you provide to this question should demonstrate that you understand it takes many people with different skills sets and abilities to complete a project. Show the interviewer you know that an effective project manager doesn't have to be good at everything; they just have to be able to put together and manage a team of professionals with diverse skill sets and competencies.