An item of work (task, activity, phase) that is a unique part of a project's work breakdown structure (WBS). All WBS items together constitute 100% of a project's work.

All work associated with a project can be broken down both hierarchically and functionally at the WBS items selection step. It is possible to view, extend, shorten and move all the WBS items graphically in the graphical planner.

WBS items can be archived and dearchived. When (de)archiving a WBS item, Planon will also automatically (de)archive all related subitems.