PTC Windchill RV&S (formerly Integrity Lifecycle Manager of the Integrity suite) is an MBSE (model-based systems engineering) suite. The former Integrity suite contains an Asset Library which supports systems-of-systems approach to design (i.e. linking models into higher-level models that subsume them), a Process Director which is designed to articulate, manage and improve the design process, and a Modeler for visualizing and controlling the product design process. The Integrity suite is rebranding and being integrated into PTC's Windchill product suite.