What Is Decomposition?
Decomposition is the subdividing of the major project deliverables into smaller, more manageable components.
The purpose of decomposition is to identify the top-level elements of the project and then divide the elements into manageable pieces for scheduling and tracking. This process is used to develop the PBS and the WBS.
The OBS shows the project organizational unit responsible for each of the deliverables and components.
Types of Breakdown Structures
There are three types of breakdown structures. Move your mouse pointer over the name of each breakdown structure to read a description of it.