Sound quality is becoming a major target for vehicle and powertrain development. To handle this complicated subject effectively it is recommended to define sound targets on a basis of present state analysis or modeling work in close conjunction with an estimation of the technical potential and, in parallel, of digital noise signal manipulation. Thus, the target sound may be defined to a practicable type. Carry over of experienced results has proven to be most important to keep pace with the simultaneous engineering process. This paper concentrates on the sound development process of the powertrain with respect to the vehicle interior noise quality.