Example of Uses of WBS, PBS, and OBS
I really like the following chart, which depicts the uses of the WBS, PBS, and OBS.
At the upper left of this chart, you can see the requirements for the project as inputs to the WBS, OBS, and PBS. The requirements are the Supplier Management Plan, the Integration Strategy, and the system solution.
The project management outputs from the WBS, PBS, and OBS are the Status Reporting, the Cost Estimation Development, and the Project Schedule at the bottom of the chart. At the upper right is the two-way Communications Management that occurs during the entire project.