InteriorCAD XS is a plug-in for Vectorworks. In fact, it is a suite of plug-in tools. It does not come as a standard installation; it is something that you have to purchase in addition to Vectorworks.
Vectorworks 2017 has a new Custom Cabinet tool that is a derivative of InteriorCAD. Interior CAD comes in two suites: InteriorCAD XS, which we will be looking at, and the fuller, more complex version for kitchen manufacturing, which is called InteriorCAD. In this manual, we will only be looking at InteriorCAD XS.
Vectorworks comes with basic cabinets and the Custom Cabinet tool mentioned above. These are often enough for some designers. Some designers want to have more flexibility in their ability to design cabinetry. In this case, InteriorCAD XS is a good solution.