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Comparing risk of failure models in water supply networks using ROC curves

机译:使用ROC曲线比较供水网络中的故障模型风险

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摘要

The problem of predicting the failure of water mains has been considered from different perspectives and using several methodologies in engineering literature. Nowadays, it is important to be able to accurately calculate the failure probabilities of pipes over time, since water company profits and service quality for citizens depend on pipe survival; forecasting pipe failures could have important economic and social implications. Quantitative tools (such as managerial or statistical indicators and reliable databases) are required in order to assess the current and future state of networks. Companies managing these networks are trying to establish models for evaluating the risk of failure in order to develop a proactive approach to the renewal process, instead of using traditional reactive pipe substitution schemes.rnThe main objective of this paper is to compare models for evaluating the risk of failure in water supply networks. Using real data from a water supply company, this study has identified which network characteristics affect the risk of failure and which models better fit data to predict service breakdown.rnThe comparison using the receiver operating characteristics (ROC) graph leads us to the conclusion that the best model is a generalized linear model. Also, we propose a procedure that can be applied to a pipe failure database, allowing the most appropriate decision rule to be chosen.
机译:已经从不同的角度并在工程文献中使用了几种方法来考虑预测水管故障的问题。如今,准确地计算出随时间推移的管道故障概率非常重要,因为自来水公司的利润和为市民提供的服务质量取决于管道的生存时间。预测管道故障可能会对经济和社会产生重要影响。为了评估网络的当前和未来状态,需要使用定量工具(例如管理或统计指标以及可靠的数据库)。管理这些网络的公司正在尝试建立评估失败风险的模型,以便开发出一种主动的更新过程方法,而不是使用传统的反应性管道替换方案。本文的主要目的是比较评估风险的模型。供水网络故障的原因。这项研究使用供水公司的真实数据,确定了哪些网络特征会影响故障风险,以及哪些模型可以更好地拟合数据以预测服务故障。rn使用接收器运行特征(ROC)图进行比较得出的结论是:最佳模型是广义线性模型。另外,我们提出了可以应用于管道故障数据库的过程,从而可以选择最合适的决策规则。

著录项

  • 来源
    《Reliability Engineering & System Safety》 |2009年第1期|43-48|共6页
  • 作者单位

    Centro de Cestion de la Calidad y del Cambio, Dpt. Estadistica e Investigacion Operativa Aplicadas y Caiidad, Universidad PoUtecnica de Valencia, E-46022 Valencia, Spain;

    Centro de Cestion de la Calidad y del Cambio, Dpt. Estadistica e Investigacion Operativa Aplicadas y Caiidad, Universidad PoUtecnica de Valencia, E-46022 Valencia, Spain;

    Dpto. De Ingenieria Hidraulica Y Media Ambiente, Instituto Tecnologico del Agua, Universidad Politecnica de Valencia, E-46022 Valencia, Spain;

    Universidad Diego Portales, Santiago, Chile;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cox model; accelerated lifetime models; generalized linear models; ROC curve; optimal operating point;

    机译:考克斯模型加速寿命模型;广义线性模型;ROC曲线最佳工作点;

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