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The paper researched and analyzed the characteristics, deficiencies and reasons of a management system of a software enterprise project to design a software project management system based on CMMI 1.2, thus helping the enterprise to improve development and management efficiency of software project and reduce the risks and costs on project devel- opment. It studied CMMI model version 1.3 which is recently released by SEI, analyzed its characteristics and told the difference between version 1.2 and version 1.3. In addition, an improvement proposal and a solution of the software project management system were given from multiple perspectives

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