HKSM
Work Breakdown Structure (WBS)
A deliverable-oriented structure that breaks the entire project scope into progressively smaller parts, defining all the work the team must perform to meet the project objectives and produce the required outputs.
Key Points
- Represents 100% of the scope; nothing missing and nothing extra.
- Organized hierarchically, with each level further decomposing deliverables and work.
- The lowest level is the work package, which can be estimated, assigned, and tracked.
- Focuses on what will be delivered, not when or how; it underpins the scope baseline and planning.
Example
For a website redesign, the top level is "Website Redesign." Level 2 includes Planning, UX/UI, Content, Development, Testing, and Deployment. Under "Content," work packages might be "Content audit," "Write product pages," and "Create images," each with its own estimates and owners.
PMP Example Question
Which artifact provides a deliverable-oriented, hierarchical breakdown that ensures 100% of the project scope is identified?
- Project scope statement
- Work Breakdown Structure (WBS)
- Activity list
- Network diagram
Correct Answer: B — Work Breakdown Structure (WBS)
Explanation: The WBS decomposes the total project scope into deliverable-oriented components, applying the 100% rule, while the other options do not provide a hierarchical breakdown of scope.
