A Work Breakdown Structure includes dividing a large and complex project into simpler, manageable, and independent tasks. The root of this tree (structure) is labeled by the Project name itself. For constructing a work breakdown structure, each node is recursively decomposed into smaller sub-activities, until at the leaf level, the activities become undividable and independent. It follows a Top-Down approach. A work breakdown structure is a key element for planning your project tasks and allocating your resources. Learn all about WBS here. The West Bengal Civil Service (Executive) (Paśchimboṅgo Nāgarik Sēbā), commonly known as W.B.C.S. (Exe.), is the civil service of the Indian state of West Bengal. WBCS Full Form: WBCS is a prestigious state-level examination conducted by the West Bengal Public Service Commission (WBPSC) to recruit candidates for various administrative positions in the state government. The WBCS Full Form stands for West Bengal Civil Services.