Confronted with increasing complexity and safety requirements for tomorrow's vehicles, car designers increasingly use virtual test approaches to assure the correct functions of their systems. Complementing the known tool array of Hardware-in-the-Loop (HiL) and Software-in-the-Loop (SiL), technology company IPG GmbH suggests an approach it calls Vehicle-in-the-Loop (ViL), allowing users to significantly reduce the time to develop their Advanced Driver Assistance Systems (ADAS).