[adorton]

A "people manager" should never be put in charge of project or schedule management. It creates a conflict of interest between the realities of the project, and the outside pressure the manager may receive from other teams.

That's why, at least with Scrum, the agile manager, if he or she is part of the same team, reports to the same manager as the development team. The agile manager's job is to keep the agile process running smoothly, removing impediments, etc.