WBS Complete a Work Breakdown structure for the project. A work breakdown structure (WBS) in project management is a tool used to define and group the project's discrete work elements to organise and define the total work scope of the project. The WBS is a dynamic tool and can be revised and updated as needed by the project manager. Develop the WBS for 3 levels work package starting with the key deliverables (3-5) and then adding work-packages (2- 3/deliverable) and sub-work packages (2-3/deliverable)