Research and Development on Closed-Loop SPC System in Automobile Components Sector

Compared with the traditional SPC process, a new theory of closed-loop SPC control chart based on up-to-date information technology is put forward. With this theory, a novel approach for data acquisition, on-line statistical analysis, failure feedback, information management, quality evaluation is complimented, and a corresponding software system based on this theory is developed. This system could feedback to the forefront workers with the updated manufacturing information quickly. The workers can adopt advised necessary steps they need to ensure the stable manufacturing process according to the feedback information. The closed-loop SPC system can monitor key process quality and instruct production, which has important and practical meaning on product control and management.