Work Breakdown Structure
A hierarchical decomposition of the total project work into smaller, manageable deliverables.
The Work Breakdown Structure is a hierarchical, deliverable-oriented decomposition of all project work into progressively smaller components, ending in work packages at the lowest level. It is created during the Create WBS process and, together with the scope statement and WBS dictionary, forms the scope baseline. Each element represents a deliverable or outcome, not an activity. The WBS defines what must be delivered, while the schedule defines how and when. Per the 100% rule, work absent from the WBS is outside scope. The WBS dictionary holds detailed descriptions, acceptance criteria, and resource estimates.
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