An increasing number of applications in the chemical industry involve measuring nonconforming items, particularly in high‐purity processes or high‐yield processes. Dedicated monitoring tools such as the time‐between‐events (TBE) control charts have been developed for both discrete time (CCC‐charts) and continuous time (t_r‐charts) for detecting any shifts in the process defect rate. However, most common performance metrics used in literature are not always appropriate and may not suffice to describe the efficiency of a monitoring system. The definition of conditional performance measures described in the literature is extended to TBE charts. These metrics are computed for Shewhart‐type TBE charts with run rules and used to compare these charts at different aggregation levels.

中文翻译：

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离散事件和连续事件之间时间控制图的性能度量

在化学工业中，越来越多的应用涉及测量不合格品，尤其是在高纯度工艺或高产量工艺中。开发了专用的监视工具，例如事件间时间（TBE）控制图，用于检测离散时间（CCC图）和连续时间（t _r图），以检测过程缺陷率的任何变化。但是，文献中使用的大多数常见性能指标并不总是适当的，并且可能不足以描述监视系统的效率。文献中描述的条件绩效指标的定义已扩展到TBE图。这些度量标准是针对具有运行规则的Shewhart型TBE图表计算的，并用于比较不同聚合级别的这些图表。