WBS (field)

Work breakdown structure. The hierarchy of tasks in a task plan. A work breakdown structure is often represented as a series of delimited numbers, letters, and/or characters, separated by period, plus, slash, and/or minus symbols. For example, 1.A.a could be the way that your organization chooses to define the sequence. When a task is the 2nd summary task in the task plan (itself with a series of summary tasks), the 3rd task for the 2nd sub-summary task would have a work breakdown structure of 2.B.c.