Research On Computer Integrated Quality Control System Based On Statistical Process Control

Intense market competition and increasing quality demand accelerate drawing advanced techniques such as information technique, computer technique into the field of quality management and control in a corporation, making a good foundation for the modern quality management and quality assurance. It is of important significance to unfold the research about constructing new pattern of modern quality management, which is on the basis of computer application techniques and has the kernel of information integration and combines the advanced quality control technique with information process technique and modern quality management methods. Computer integrated quality system (CIQS) is a very important portion of contemporary integrated manufacture system, which is the new stage for computer aided quality system development and the high-level construction phase of quality management information system of modern enterprises. It plays an important role in integrating information resources, enhancing product quality and management level and increasing competitive ability for modern enterprises.The dissertation discussed the critical role of quality control in quality management and analyzed synthetically the complexion of development and research about CIQS first. And then it studied the implement of forecast and control of products quality in the condition of integrated manufacture, combined with the discussions of design for a corporation's information integration scheme and the plan and development for a project of 'Integrated Quality Control System of 4DA1 diesel motor'. The main contents and innovations are as follows:Firstly, based on summarizing modern quality concept and the developmental actuality of CIQS, the research was carried out on the problems in actualizing statistics quality control of integrated manufacture environment, and some tactics and methods of its implementation are proposed.Secondly, based on discussion of CIQS models, a model of workshop-level integrated quality system is presented, which is product information flow oriented. The problems about the model and its implementation method are discussed, including the integration method based on PDM and the description for information flow of workshop-level integrated quality system.Thirdly, on the base of analyzing and exploiting strategy and method of applications for statistics quality control with brainpower and defining the pattern string of multidimensional input data, a algorithm of pattern matching based on Deterministic Finite Automata (DFA) is proposed to realize rapid abnormality matching of normal control charts, which has been successfully applied in a computer aided quality system.Fourthly, applying the above methods and technologies in the plan of enterprise automatization information integration and the project of 'Integrated Quality Control System of 4DA1 diesel motor', we implemented a Computer Integrated Quality Control System based on SPC.