Risk Categorization
Organization by sources of risk (e.g-., using the RBS), the area of the project affected (e.g., using the WBS), or other useful category (e.g., projectphase)1 to determine the areas of the project most exposed to the effects of uncertainty.
Project Management Institute, A Guide to the Project Management Body of Knowledge (PMBOK® GUIDE) – Sixth Edition, Project Management Institute, Inc., 2017