In at least two (probably more) the guide (version 6) talks about how the Project Manager and team should understand and analyze the duration of the rolling wave in effect for planning purposes (6.1)
I understand the concept of rolling wave planning, but how is the DURATION of the wave analyzed? Is there a mathematical technique that one can use to establish what the rolling wave SHOULD be for a project? That's pretty strongly hinted at by the PMBOK guide in chapter 6. Saving Changes...