基于组件的系统可靠性预测新方法

T. Hayat, Habib Seifzadeh
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引用次数: 1

摘要

可靠性是软件的一个定性特征,一直是众多研究者关注的焦点。可靠性的定量评价有几个指标,如系统或整个系统中任何部件的平均故障时间、平均修复时间、高可用性、安全性和故障概率。在利用用例图预测可靠性的方法中,计算程序中每个用例的故障概率,并利用这些信息来实现整个系统的可靠性。然而,据我们所知,这些方法在每个用例中考虑执行路径失败的概率是相同的。本研究旨在提高以往方法的准确性,获得不同执行路径的不同失效概率,并更仔细地计算可靠性。对基于web的事务处理系统进行了可靠性预测和评估。因此,整个系统的故障概率置信区间为0.0008,小于基本方法的置信区间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A New Approach to Reliability Prediction in Component-based Systems
Reliability is a qualitative feature of software that has been the focus of numerous researchers. There are several measures for quantitative evaluation of reliability, such as mean time to failure, mean time to repair, high availability, security and probability of failure of any component in the system or the whole system. In the approaches that exploit Use-case diagrams to predict reliability, the probability of failure of each use-case in the program is calculated, and using this information the reliability of whole system is achieved. However, to our knowledge those approaches consider the probability of failure of executive paths in each use-case the same. The current study intends toimprove the accuracy of pastapproach and obtain the probability of different failures for various execution paths and calculate the reliability more carefully. A web-based transaction processing system is checked to predict and evaluate the reliability. As a result, the confidence interval of the probability of failure for the entire system is .0008 which is smaller than that of the base approach.
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