It is not a project; unless it is implemented.
Plans are worthless; Planning is essential. PMO (Project Management Office) in any organizations is responsible for Enterprise Project Management Planning, Infrastructure and Methodology.
Steering Committee, who individually can do nothing, but as a committee can drive a project.
Project Sponsor, Project Owner, Project Manager and Key Stakeholders are pillars of the project.
The Project Manager is a key stakeholder authorized to manage the day-to-day activities and deliverables of the project. Every project names a single individual as the Project Manager who demonstrates knowledge in the following areas; cost, scheduling, risk and issue management, and project reporting.