Abstract: Software defect management is an important method of improvement on software quality and development efficiency. After comparing currect popular defect management tools, this paper designs a defect management system based on CMMI and PI3000. This system has structure of B/S, implements the process of defect tracking, controls the status changing, has such functions as query, statistical analysis and so on. This system aggregates excellencies of many other tools. The results of application show that this system can improve software quality and development efficiency.

Key words: CMMI, software defect, defect management, defect flow, defect measure