This paper deals with the Defect reduction (DPU-Defect per unit) of MDT (Medium Duty Trucks) all over CIW (Cab-In-White) for increase in production rate and reduction in rework with subtraction of repeated concerns. Quality and performance of a Product is the one that weighs the OEM’s name, Bharath Benz was never the less in this area as Benz is named for its unique magic in makes. Basically Two Trucks are produced in CIW (Cab in White) – Heavy Duty Truck (HDT) & Medium Duty Truck (MDT). 60% of the HDT are made by Robots were as the MDT is of 20%, here starts the Difference in Production rate and quality issues which automatically degrades the Fame of the company. Keeping each and every concern in mind the main aim of the project is sketched in a way to increase the production to maximum and eliminate the defects to minimum. The Quality circle is implemented in the department and some of the results are picturized in this journal.