A PMO (small or big in resources) helps you to control and oversee the projects that run in your organization.
Using the Hoshin Kanri process you’ve carefully selected the projects you wanted to start and stated the goals for these projects.

However: this does not ensure that they keep running as initially planned, nore does it give you insight in how loaded the resources in your organization have become (think of the few ‘shiny' people that every project wants)

Your PMO will help you:

• Ensure project are executed according planning and within budget
• Projects stay aligned with business goals
• Stakeholders have a clear visibility into project progress
• Use a standardized process for initiating and executing projects
• Enable you to track project success or failure