One of the core responsibilities of a PMO Analyst/Officer is to track deliverable around Scope, Budget and Timeline by keeping an eye on the budget against the expenditure using the timeline as a parameter.
Also, more often than not, communications are routed through the PMO office from the project to other Senior Leadership Team (SLT)/Stakeholders. This is usually done in a reporting format which are produced weekly or as baselined on the project. Standard reports required are not limited to the below:
1. Status Report
2. RAID Log
3. Checklist Report
4. Highlight Report
5. Lessons Learnt
PMO essentially support and track the activities around the project making sure the BA/Developer/Tester etc deliver to their task as required. PMO also work very closely with the PM by making sure governance approach is adhered to and the communication plan is strictly followed. Depending on the project, a PMO Analyst may be required in building a project plan. maintain the plan by adding and allocating task to resources on the project plan, track and zero down resources as soon as their task are completed.
In conclusion, the PMO office functions as both the support/policing arm (depending on role on the project) in making sure the project delivers to Scope, Budget and Timeline.