Research And Application On Software Process Defect Metrics

With the development of software size, the quality of software has become more and more obvious, which may result in increase of the cost and the delay of delivery. The software products quality improvement depends on the software process improvement, and the software process defect measurement can promise the software process quality and discover the problems in the development process which will provide a quantitative management basis for process control, process evaluation and continuous improvement. CMMI has been recognized as software product permit to enter the international market, which is not only product quality certification, but also a software process improvement approach. Therefore, software process defect metrics based on CMMI is an issue which is worthy of further study.This thesis begins with the meaning and the background of topic and the software process measurement model and defect measurement method has been researched and applicated under the existing CMMI process management framework. It proposes a new software process defect management process and the process has been applyed in practical projects based on the analyse of defect management and buliding measurement model. So firstly, the thesis studies software process measurement theory deeply and data analysis and quality control tools, which work as a measure of theoretical basis and application tool, and then studies the Capability Maturity Model Integration, which is as a defect management and measurement reference standard. Secondly, it analyses the defect types, priorities, statuses, etc. At the same time, it also analyses the general features of CMMI key process domain and establishes the general features correspondence between CMMI process areas and software process measurement model. Finally, it analyses the disadvantages of the original software process management process and proposes the after-approved defect management and measurement processes and verifies this management process in the practical projects.The results of research proved that the introduction of defect removement effectiveness and risk transfer measurement method in the traditional defect management process enables us to correct defect and dig out more useful information for project management. Then we take advantage of the information to establish the process capability baseline and achieve quantitative process management. Through the practice in a software company projects and the feedback of quality management department and clients, it can be conclued the project's over-all examination and defect removement effectiveness have been obviously improved and the project risk cost has also been effective controled, which is helpful for quality plan and qulality management and also verifies that the proposed software porcess defect management and measurement is effective. The results only reflect one aspect in software process defect measurement. We need to continue to expand the effect and application in software quality assurance.