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The following PMP® exam sample question is taken from the Free PMP Exam Simulator at - The answer is at the very bottom:


Regarding WBS Quality Principle 1, there are two sub-principles that pertain to satisfying requirements for the use of a WBS. Which of the following are these two sub-principles?

A.) Hierarchical and Lucid
B.) Well Formatted and Scope Relevant
C.) Core Characteristics and Use-Related Characteristics
D.) None of the above

Hint: PMI acknowledges WBS Quality Principle 1.

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Until next time,
Cornelius Fichtner, PMP
President, OSP International LLC
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The correct answer is C
Explanation: Core Characteristics and Use-Related Characteristics are the two sub-principles of WBS Quality Principle 1. These principles are explained in the PMI practice standard for WBS. NOTE: This is probably one of the most obscure types of questions you will encounter on practice exams or on the actual PMP Exam. The PMI actually published a document separate from the PMBOK Guide titled "WBS Quality Principles", which outlines the suggested guidelines to use when performing the Create WBS process. Please refer to this document (available at for more detailed information.
Reference: PMI Practice Standard for WBS 2nd Edition, page 19

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