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Why do requirements come before scope?

I've always been confused by PMI's scope timing.  It comes after the requirements.   How do you know what you need requirements for?  How do you know when the requirements are done if you don't know the scope of the effort?
asked 8 years ago by anonymous

1 Answer

I would ask the opposite question.  How do you know what the scope is if you don't know what it is you are going to do?  This is why the PMBOK Guide also encourages 2-3 estimates.  As you get deeper into the project and get a better understanding of what is to be delivered, you need to re-estimate to be certain you have included all the work.
answered 8 years ago by sdcapmp (45,840 points)

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