WBS Dictionary

A structured reference that, for each WBS element, records its deliverables, the work to be performed, and related schedule details.

Key Points

  • Expands the WBS by adding descriptive details for each component or work package.
  • Typically includes scope description, deliverables, activities, acceptance criteria, owner, milestones, estimates, and schedule info.
  • Reduces ambiguity and supports planning, estimating, risk analysis, and control.
  • Each entry maps to a unique WBS code and can be tailored to the needed level of detail.

Example

On a CRM implementation project, WBS element 3.2 "Data Migration" has a dictionary entry listing the deliverable (customer data migrated to the new system), key activities (extract, transform, load; data validation), acceptance criteria (99.5% accuracy; no critical data loss), responsible owner (Data Lead), dependencies (environment ready, source data freeze), and a schedule window (weeks 8-10).

PMP Example Question

Which document should the project manager review to find acceptance criteria and schedule details for a specific work package?

  1. WBS Dictionary
  2. Project schedule network diagram
  3. Requirements traceability matrix
  4. Issue log

Correct Answer: A — WBS Dictionary

Explanation: The WBS dictionary provides detailed information for each WBS component, including deliverables, activities, and schedule-related details.

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