Research On Development Method Based On Quality And Function Goal For Large-scale Complicated Information System

With the rapid progress of computer technology, especially of Internet and its application, the applied field of the information system is from pure business process to all field of the society, the primary purpose of information system is from improving internal efficiency and effectiveness, external efficiency and effectiveness to also supporting integration and organization connection. In a word, the information system is develop fast along the networked and integrated direction, and becomes more and more large and complex.This kind of development tendency of the information system has already made its applied environment turn from static and close into Dynamica and open. The focus and difficulty of information system development concentrate on three characteristics of the product and project: high speed change, high variety and highly uncertain. In the face of this kind of new applied environment, traditional software theory, development approach and technology have met the unprecedented challenge. As the problems of the large-scale complicated information system development become more and more serious and almost sink into a state of lose control, the research on the software development model and approach about large-scale complicated information system is causing people's great attention, and has become one of the key problem in the research field of information system..Based on the research work and practical experience in developing the large-scale complicated information system done by author, this thesis study and research the development method of large-scale complicated information system. The main content of these studies is as following:(1) Systematically summarized the development course and current studying status of the research on information system development method and related domain, including the software development model, requirement engineering, software architecture and so on, pointed out their each weak point and development direction.(2) Base on system and system movement, software development system 6 meta structure model and basic dynamic structure model are proposed.(3) Base on the summarizing to system science and complexity science, systematically analysis and study about the essential characteristic of complexity about large-scale complicated information system development and basic origin cause of software crisis are carried on utilizing software development system's 6 meta structure model and it's basic dynamic structure model.(4) Base on the deeply understanding about complexity of large-scale complicated information system development, some new cognition viewpoints about information system and information system development are proposed utilizing complex systems self-organized evolutionary theory.(5) In view of the large-scale complex information system's development environment characteristic, one set of complete modelling design and development method based on quality and function goal for large-scale complicated information system(LCIS-QFGBMDDM), included the cognition and method rationale, development process model, organization structure model, system analysis and development method, is proposed through synthesized and integrated to the many kinds of outstanding information system development method.The supporting tool is developed based on LCIS-QFGBMDDM's basic principle and concrete content.