In software developing organization process innovation is very important. One organization's process level can estimate by CMM level. ISO/IEG TR15504 process assessment, etc. But process level can estimate by real data at work place. For example work time, step size of systems, review times etc. In this paper we propose a process estimate model by these data. In this model we estimate correlation between productivity and defect for the program reuse rate, design review man-hour rate and test specification review man-hour rate. By use this model we estimate a company's process and it is confirmed this model is useful.
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