All new in NX 12.0.2 features enhancements to the validation tool within NX. This particular feature focuses on the cutout features in a sheet metal part and the minimum distance between those cutouts. The minimum value is also a factor of the material thickness of the sheet metal part.
This new enhacements allows you identify potential manufacturing problems within the sheet metal application prior to release. This will also save rework cost and increases your quality by identifying these potential issues during design.