Definitions for "Work Breakdown Structure"
a tool for defining the hierarchical breakdown of responsibilities and work in a project. It is a checklist of every activity that must be completed to create the end product.
the management work product that documents the work to be performed on the project.
("WBS") task oriented detailed breakdown, which defines the work package s and task s at a level above that defined in the network s and schedule s. The WBS initiates the development of the Organizational Breakdown Structure ( OBS), and the Cost Breakdown Structure ( CBS). It also provides the foundation for determining Earned Value and activity network [D03777
Keywords:  laid, particular, way, list
a list, laid out in a particular way
a series of activities arranged in a hierarchy