Work breakdown structure (or WBS) is a hierarchical tree structure that outlines your project and breaks it down into smaller, more manageable portions. The goal of a WBS is to make a large project more manageable. Breaking it down into smaller chunks means work can be done simultaneously by different team members, leading to better team productivity and easier project management overall¹. Creating WBS enables to have accurate assignments of responsibilities to the project team, it indicates of project milestones and control points, allows to estimate the cost, time and risk, and also, illustrates the project scope.

            Basically, WBS has a necessary role for attaining success in project management because as I mentioned above it serves many advantages which leads to accomplish the project with the most efficient way. Thus, the work breakdown structure allows project managers plan and monitor their work successfully. A project is characterized by time-limited activities and is assigned fixed time frames and costs. When it is finished, a project must fulfill the stakeholder needs it was designed to address. The project management has to plan for the schedule, the fixed costs and the functional completeness of the project and assign responsibilities. In this case, the WBS helps make this planning consistent and provides for effective project execution.

            Moreover, as an important part of project management is to assign responsibility for the work. With a WBS, the project management assigns responsibility for each of the tasks. So, the task manager is accountable for completing the full scope of the project on time, within the budget and with all of its planned functionality intact. Thereby, within these processes, the WBS facilitates the execution and also monitoring of the project which allows to maintain accomplishment of the project. Therefore, WBS is the significant part of scope planning in order to guarantee project success.

References:

1. https://www.wrike.com/project-management-guide/faq/what-is-work-breakdown-structure-in-project-management/