Specifies a further breakdown for the type of control point. As in the Type box, you choose an option from a select list. Possible subtypes are Process Equipment, Mechanical Equipment, Foundation, Structure, Pipe Mfg Limit Point, Spool Break, Duct Break Point, WBS Pipe Break - Fabrication, WBS Break Point Type 1, WBS Break Point Type 2, WBS Break Point Type 3, WBS Break Point Type 4, WBS Pipe Break - Stress, WBS Break Point Type 5, WBS Pipe Break - Tracing, WBS Pipe Break - Generic, WBS Pipe Break - System, Elevation Callout, Ad Hoc Note, CAD Detail, Key Plan Callout, Support Notes, Isometric Reference Dimension, Isometric Start Point, and Pipe Stress Delimiter.