Abstract
Since the door window system is repeatedly used by the vehicle owner, it has a great influence on his perception of quality. The performance of the door window system is dependent on manufacturing and assembly variations in the weather-strips, door sheet metal, regulator, regulator motor, glass etc. The Taguchi Tolerance Design of Experiment was performed using computer simulation to evaluate window performance in terms of glass speed and stall force. As a result of this study, tolerances of component design parameters of the door window system were determined using percentage contribution analysis much earlier than previous design practices would have provided. Also, Quality Loss Function (QLF) methodology was used to make decisions about relaxing/tightening tolerances.
