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Economic design of an integrated process control procedure with repeated adjustments and EWMA monitoring

机译：具有重复调整和EWMA监控功能的集成过程控制程序的经济设计

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A repeated adjustment EPC scheme has been introduced for reducing the process variability for the situation in which the underlying process is ARIMA (0,1,1), with a possibility of special causes affecting the process. The special causes, it is assumed, can change the process level, the process variance, the moving average parameter, or the system gain. Two EWMA (exponentially weighted moving average) control charts: one for detecting mean shifts, and the other for detecting variance increases, are applied to the observed deviations to detect special causes. The effectiveness of the IPC scheme is evaluated using the expected cost per unit time. The study also investigates the effects of the process and cost parameters on the expected cost per unit time, and offers practical guidelines for the efficient selection of the chart parameters of the two EWMA control charts. (29 refs.)
机译：已引入重复调整EPC方案，以减少基础过程为ARIMA（0,1,1）的情况下的过程可变性，可能有特殊原因影响过程。假定特殊原因会改变过程级别，过程差异，移动平均值参数或系统增益。将两个EWMA（指数加权移动平均值）控制图：一个用于检测均值偏移，另一个用于检测方差增加，用于观察到的偏差，以检测特殊原因。 IPC方案的有效性使用每单位时间的预期成本进行评估。该研究还调查了过程和成本参数对单位时间预期成本的影响，并为有效选择两个EWMA控制图的图表参数提供了实用指南。 （29参考）

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