The WBS Dictionary
The WBS dictionary is a repository for descriptions of work elements and other key information such as budgets, basis of estimate, and staffing. The dictionary contains detailed background information about each work element. It might also include acceptance and completion criteria. Using the dictionary, team members can capture information about each activity.
After an activity is defined, that definition remains throughout the project. The definition is used to explain activities to employees and to clarify where work begins and ends on an activity.
The dictionary helps determine whether the project manager has identified the skills needed to do the work.
It should contain the following information for each element:
The Foundation of Project Planning
The WBS is the foundation of the project in terms of cost estimating, planning, budgeting, funding, estimating, scheduling, status reporting, managing risks, measuring performance, and managing change. The WBS is used throughout the project as a tool for communication, and it grows and develops with the project from the first day. If the project plan is revised, the WBS must also be revised.