If a process happens to update other process' outputs, then we would consider it as project document updates.
Per PMBOK4, Define activities generates activity list,attributes and milestones, by taking inputs from scope baseline, PMIS (EEF), scheduling methodology (OPA) etc. The process does not update any existing project documents by that time.
For example, Risk response planning may identify changes to WBS and the activities list. This is another PMIism, may be!
I feel while decomposing the work packages into activities, you might realize that few work packages were missing, and you might as well change WBS. If PMP is not yet approved, thats okay, other wise you would go through change control process to reissue scope baseline.
Moderators: Yolanda Mabutas, Ahmed Amin, Scott Gillard, Mary Kathrine Padua, ERIC BARTLETT, Gail Freedman, Kevin Nason, Steven Mudrinich, PMP, Mark Wuenscher, PMP, John Wolverton, Tracy Shagnea, PMP, Jada Garrett
This interview with Simona Fallavollita (LinkedIn Profile) was recorded at the magnificient Project Management Institute (PMI)® Global Conference 2017 in Chicago, Illinois. We discuss the how, what, why and when of the changes that are coming to the PMP exam.