QUESTION
If someone has written PMP on their resume. What can I assume that they know about project management?
Would they know what is scrum, extreme programming, waterfall, etc? Would they know which methodology to chose and when?
What is safe to assume about a person with PMP Certification?
EDIT: Alternate wording of the question is what is taught to a PMP and what is he tested against?
ANSWER
Hasan, David's answer is exactly correct. It guarantee's nothing. But if your question is more along the lines of what does it 'imply' a guarantee of...
It implies that the PM understands and uses commonly used processes and vocabulary that would be understood in most industries. It also implies that the PM knows how and when to use these processes correctly.
Unfortunately these are only implied, and neither true or guaranteed.
So what is tested against? WBS, EV, CP, the 9 Knowledge Areas, the 42 processes, good practice, ethics, etc., but ONLY as can be applied to ALL industry. So would they know scrum, XP, waterfall, etc.? Not to pass the PMP. Those are specific methodologies and the PMP does not deal with those. The PMBoK Guide (on which the PMP is based) was designed as a high level framework from with methodologies can then be developed.
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