There are three interdependent factors that drive our software development processes: interval, quality and cost. As market pressures continue to demand new features ever more rapidly, the challenge is to meet those demands while increasing, or at least not sacrificing, quality. One advantage of defect prevention as an upstream quality improvement practice is the beneficial effect it can have on interval: higher quality early in the process results in fewer defects to be found and repaired in the later parts of the process, thus causing an indirect interval reduction.
We report a retrospective root cause defect analysis study of the defect Modification Requests (MRs) discovered while building, testing, and deploying a release of a transmission network element product. We subsequently introduced this analysis methodology into new development projects as an in-process measurement collection requirement for each major defect MR.
We present the experimental design of our case study discussing the novel approach we have taken to defect and root cause classification and the mechanisms we have used for randomly selecting the MRs to analyze and collecting the analyses via a web interface. We then present the results of our analyses of the MRs and describe the defects and root causes that we found, and delineate the countermeasures created to either prevent those defects and their root causes or detect them at the earliest possible point in the development process.
We conclude with lessons learned from the case study and resulting ongoing improvement activities.
以下三个相互影响的因素驱动着我们的软件开发流程:间隔,质量和成本。随着市场压力继续以越来越快的速度要求新功能,面临的挑战是在提高或至少不牺牲质量的同时满足这些要求。预防缺陷作为上游质量改进实践的一个优势是它可以对间隔产生有益的影响:在过程的早期提高质量可以减少在过程的后期发现和修复的缺陷,从而间接减少间隔 P>
我们报告了在构建,测试和部署传输网络元素产品的发行版时发现的缺陷修改请求(MR)的追溯根本原因缺陷分析研究。随后,我们将这种分析方法引入到新的开发项目中,作为每个主要缺陷MR的过程中度量收集要求。 P>
我们提供了案例研究的实验设计,讨论了我们用于缺陷和根本原因分类的新颖方法,以及用于通过网络界面随机选择MR进行分析和收集分析的机制。然后,我们介绍对MR进行分析的结果,并描述发现的缺陷和根本原因,并描述为防止这些缺陷及其根本原因或在开发过程中尽早发现这些问题而创建的对策。 / P>
我们从案例研究中汲取了教训,并进行了持续的改进活动。 P>
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