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首页> 外文期刊>Journal of applied statistics >A mixed control chart for monitoring failure times under accelerated hybrid censoring
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A mixed control chart for monitoring failure times under accelerated hybrid censoring

机译：加速混合污染下监测失败时期的混合控制图

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摘要

In an accelerated hybrid censoring scheme several stress factors can be accelerated to make the products to respond to fail more quickly than under normal operating conditions. In such situations, the control charts available in the literature cover the attribute characteristics only to monitor the performance of the process over time. This study extends the idea by proposing an optimal mixed attribute-variable control chart for Weibull distribution under an accelerated hybrid censoring scheme keeping the advantages of both attribute and variable control charts. It first monitors the number of defectives under accelerated conditions and switches to the variable control chart to investigate the mean failure times when the process stability is dubious. The performance of the proposed chart is evaluated by using run-length characteristics, and the optimality of the design parameter is achieved by minimizing the out-of-control average run length. The simulation study depicted better performance of the proposed control chart than the traditional charts in detecting shifts in the process. A real-life application is also included.
机译：在加速的混合审查方案中，可以加快几种应力因子，使产品能够比正常运行条件更快地响应失败。在这种情况下，文献中可用的控制图涵盖仅用于监视过程随时间的性能。本研究通过提出在加速的混合审查方案下提出Weibull分布的最佳混合属性可变控制图来扩展了该想法，该方法保留了属性和可变控制图的优点。它首先监视加速条件下的缺陷数量，并切换到可变控制图表，以研究过程稳定性是可疑的。通过使用运行长度特性评估所提出的图表的性能，通过最小化控制平均运行长度来实现设计参数的最优性。仿真研究描绘了所提出的控制图表的性能，而不是检测过程中的变化中的传统图表。还包括现实生活应用程序。

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