The Levels of the WBS
The following examples depict two-, three-, and four-level WBSs. These are partial examples because only one item at each level has been expanded to the next level. A complete WBS expands to the level needed to define and manage each item. Normally, different items are expanded to different levels.
Click each button to read the examples:
The fourth level is a decomposition of the third-level element, which is to write test cases. For a complete fourth level, all elements from the third level must be expanded. Obviously the WBS example becomes unwieldy for a normal project. For this reason, the WBS can also be depicted as an indented list.