Updates system and assembly Work Breakdown Structure (WBS) assignments.
Any given project could contain many different WBS items. Membership, for performance reasons, is not updated automatically as you add or remove objects from systems and assemblies as part of your 3D modeling tasks. The Update WBS Assignments command resolves system and assembly assignments whenever you require them to be updated.
For more information on assigning objects to WBS items, see Assign to WBS.