A car engineering assist system and method establish a master data and set a computer-generated virtual car model to represent at least a portion of a product design specification (PDS) of a test car. A real time simulator performs computer simulation of a test module using the car model, which has been set to represent at least the portion of the PDS of the test car, to produce a simulation result. A logic unit performs conformity assessment of the test module based on the simulation result and the master data.