Producing high quality products and services is one of the key concerns in order to keep up with the competition in the global markets. Companies are putting great effort on preventing customers having faulty products and services by any means. However, total elimination of mistakes in manufacturing processes has always been a great challenge for quality management. This book the poka-yoke methodology is used for reducing the number of quality failures in the automotive assembly line has been studied. Poka-yoke stands for the fool-proofing and is mainly developed for the purpose of eliminating human errors in manufacturing processes. Inspection techniques; decision, informative and source inspection are the core of this methodology.