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A field study on root cause analysis of defects in space software

机译:空间软件缺陷根本原因分析的现场研究

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Critical systems, such as space systems, are developed under strict requirements envisaging high integrity in accordance to specific standards. For such software systems, an independent assessment is put into effect (Independent Software Verification and Validation - ISVV) after the regular development lifecycle and V&V activities, aiming at finding residual faults and raising confidence in the software. However, it has been observed that there is still a significant number of defects remaining at this stage, questioning the effectiveness of the previous engineering processes. This paper presents a root cause analysis of 1070 defects found in four space software projects during ISVV, by applying an improved Orthogonal Defect Classification (ODC) taxonomy and examining the defect types, triggers and impacts, in order to identify why they reached such a later stage in the development. The paper also puts forward proposals for modifications to both the software development (to prevent defects) and the V&V activities (to better detect defects) and an assessment methodology for future works on root cause analysis. (C) 2016 Elsevier Ltd. All rights reserved.
机译:诸如空间系统之类的关键系统是在严格的要求下开发的,这些要求要求根据特定的标准实现高度的完整性。对于此类软件系统,在常规开发生命周期和V&V活动之后,将进行独立评估(独立软件验证和确认-ISVV),旨在发现残留故障并提高对软件的信心。但是,已经观察到,在此阶段仍然存在大量缺陷,这对先前的工程过程的有效性提出了质疑。本文通过应用改进的正交缺陷分类(ODC)分类法并检查缺陷类型,触发因素和影响,从而找出为什么在后来的ISVV中在四个空间软件项目中发现的1070个缺陷,对根本原因进行了分析。在发展阶段。本文还提出了修改软件开发(以防止缺陷)和V&V活动(以更好地检测缺陷)的建议,并提出了一种评估方法,以用于将来的根本原因分析工作。 (C)2016 Elsevier Ltd.保留所有权利。

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