Abstract
T automobile industry uses many robots, and a practical scientific approach of reliability enhancing activities is the key to the realisation of a highly reliable production system of faster operating production robots. The reliability of the robots is improved not only by hardware designed to be more reliable on the supplier side, but also by collecting and analysing the user's observations at the production line over a long period of time. The author has established the Robot Reliability Design and Improvement Method (RRD-IM) by developing Advanced TPS. This method has been implemented worldwide in an advanced car manufacturer and has produced a better operating life cycle for industrial robots.