Evaluate, repair, and heal models imported from other CAD systems.
You can import data from other CAD systems in Inventor. Usually, the files open as solid bodies in the part environment. When surfaces and wireframe are imported, depending on options selected during import, they are placed in the Part, Repair, or the Construction environment.
There are differences in the tools and behavior of bodies in the Repair and Construction environment.
The Repair environment:
The Construction Environment: