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Definition: A Work Breakdown Structure (WBS) is a deliverableoriented grouping of project components that organizes and defines the total scope of the project; work not in the WBS is outside the scope of the project. A WBS is normally presented in chart form. Each descending level represents an increasingly detailed description of the project deliverables.
Acceptance Level:  Generally accepted

Alternative or Related Terms: WBS

Application Areas/Intended Uses: A work breakdown structure is an output of the scope definition process.
Chief Advantages: Provides accurate definition of the total scope of a project.

Additional Reading:
A Parallel WBS for International Projects. Cornelius Grove, Willa Hallowell, and Cynthia J. Smith. PM Network, March 1999, 37-40, 42.
Breaking the Communication Barrier With a WBS. Clayton W. Harrell, PM Network, August 1994, 6-8. 4.1 10.2.
Effective WBS in Construction. John L. Homer and Paul Gunn. PMI 1996 Annual Seminars & Symposium, Boston, Massachusetts USA.
Mind Mapping as a WBS Development Tool. Karen A. Brown, PMP and Nancy Lea Hyer.
PMI 2001 Seminars & Symposium Proceedings, Nashville, Tennessee USA.
The WBS Dictionary—Extending the Work Breakdown Structure. Gregory F. Ward, PMP.
PMI 2001 Seminars & Symposium Proceedings, Nashville, Tennessee USA.
WBS.com(ponents): Building a Better WBS for Object Technology. Bernadette Truhlar,
PMP. PMI 2000 Seminars & Symposium Proceedings, Houston, Texas USA.
Work Breakdown Structure Practice Standard Project—WBS vs. Activities. Cindy Berg and Kim Colenso. PM Network, April 2000, 69-71.
Project Management Institute. Practice Standard for Work Breakdown Structures, PMI, 2001.