Abstract
We generally guess the quality of software system by examining whether or not the status of detecting the bugs and the number of test items are within standard range. But there are problem projects even if they satisfy the quality revel. Moreover the problem projects cause the delay of schedule, because the problem wouldn't come out until the next process. In this paper, we will explain the method based on the technique to measure the quality level, in addition to the quality range management. The method includes incremental development management which evaluates the quality at critical points in the development process and risk management which verifies the quality in an each downstream process in the development of software system.
