Work Breakdown Structure

2 Definitions

A hierarchical definition of the tasks and activities of a project that normally begins with the highest-level activities and works downward into the individual tasks and components.
defined by Lean Affiliates
The Work Breakdown Structure (WBS) documents the subdivision of tasks and effort required to complete an objective or project. It is most often depicted as a tree structure where high level tasks break down into lower level tasks. Low level tasks are typically grouped in various logical ways such as by system, subsystems, project phase, or a combination of these.
defined by Modern Analyst