Abstract
This paper focuses on the process capability index considering the irregular fluctuation of the operation of OSS. Recently, many open source software (OSS) are developed under various open source projects. Considering the characteristics of OSS, many OSS are used via the internet network, such as the software update service, software version upgrade, cloud service, HTTP server, mobile devices, etc. From the above mentioned characteristics of OSS, the debugging process and operating phase of OSS development will take an irregular fluctuation in the long term of operation. In particular, we apply Wiener process model to the noisy cases in the operation of OSS. Moreover, we compare the method of process capability assessment based on Wiener process model considering the irregular fluctuation for OSS projects with several nonhomogeneous Poisson process (NHPP) models. Also, we analyze actual data to show numerical examples of the proposed method considering the characteristics of recent OSS projects and the existing NHPP models.
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