What Is the OBS?
Now that you have decomposed the product (PBS) and the activities (WBS), it is time to think about how the people working on the project will be organized. The OBS shows how the project is organized by displaying the names of staffing resources for a project. It indicates who is responsible for the activities in the WBS. The OBS describes the:
The OBS contains the subproject definitions, the project organizational chart, and the team structure.