WBS decomposition is the process of breaking a project down into smaller, more manageable pieces so it’s easier to plan, execute, and control.
Let’s define the key terms:
- Decomposition is the act of dividing project deliverables into smaller and more detailed components. These components are called work packages, which are small enough to be estimated, assigned, and tracked effectively.
- WBS (Work Breakdown Structure) is the result of this decomposition process. It is a hierarchical structure that organizes all the work needed to complete the project.
When the WBS is complete, it includes 100% of the work required to deliver the project’s outcomes—nothing more and nothing less. Each level of the WBS breaks the work down further until it reaches manageable work packages.
In simple terms:
Decomposition is the process, and the WBS is the final structured output.
The main purpose of creating a WBS is to ensure that:
- All deliverables are clearly identified
- No required work is overlooked
- Each piece of work is well understood and manageable
For further information, see our posts on:
The WBS – 100% Rule
The 8 80 Rule
WBS in 3 Formats