work breakdown structure (WBS)

• Work breakdown structure

A work breakdown structure (WBS), in project management and systems engineering, is a deliverable oriented decomposition of a project into smaller components
It defines and groups a project's discrete work elements in a way that helps organize and define the total work scope of the project.[

WBS is a hierarchical decomposition of the project into phases, deliverables and work packages. It is a tree structure, which shows a subdivision of effort required to achieve an objective
http://en.wikipedia.org/wiki/Work_breakdown_structure

• Work Breakdown Structure (WBS)

The Work Breakdown Structure (WBS) provides a structural view into the project. It is an essential tool for planning and executing the project. Use the WBS to define the work for the project and to develop the project's schedule.

• WBS Dictionary

The WBS Dictionary contains all the details of the Work Breakdown Structure which are necessary to successfully complete the project. Most importantly it contains a definition of each Work Package which can be thought of as a mini scope statement.
http://www.projectmanagementdocs.com/project-planning-templates/work-breakdown-structure-wbs.html