The following PMP® exam sample question is taken from the Free PMP Exam Simulator (The answer is at the very bottom):
Which of the following statements regarding the WBS is incorrect?
A) The WBS subdivides project work into smaller and more manageable components
B) The WBS is a deliverable-oriented hierarchical decomposition of the project work
C) The WBS organizes and defines the total scope of the project
D) The components of the WBS are called work packages
Hint: All of the choices look true but one of them is a trick.
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Answer and Explanation:
The Correct answer is D. "The WBS can contain components at many levels. The planned work contained within the lowest levels of the WBS components are called work packages. The work package level is ONLY at the lowest level in the WBS. Items at the other levels of the WBS are simply called ""WBS components"".
We were looking for the INCORRECT statement among the four answers. The statement that ""The components of a WBS are called work packages."" suggests that ALL the components are called work packages. This is incorrect because (as explained above) only the lowest level contains the work packages."