A project manager is assigned to a project to achieve the project objectives; generally, to deliver the complete scope of the project within the time schedule, under the allocated budget and to the quality standards stipulated for the project Project Management Office (PMO) is more of a supporting/ facilitating entity within the organization that co-ordinates the management of several projects under its domain.

A comparison of the role of a project manager and project management office is given below:

Project Manager	Project Management Office
Focuses on the specified project objectives	Focuses on opportunities to better achieve business objectives
Controls only the assigned project resources	PMO's role is to centralize and optimize the use of shared organizational resources across all projects
Manages and balances the competing constraints of the individual project, like scope, cost, time, quality, resources and risk	Manages the methodologies, standards, overall risk/ opportunity and interdependencies among projects at the enterprise level