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 third level is a decomposition of the system test second-level element. For a complete third level, all elements from the second level must be expanded. To execute the system test, you must write test cases, prepare the test environment, conduct the test, and analyze the results.