The exponentially weighted moving average
The exponentially weighted moving average
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DOI：
10.1080/00224065.1986.11979014
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发表时间：
1986-10
影响因子：
2.5
通讯作者：
J. S. Hunter
中科院分区：
文献类型：
--
作者：
J. S. Hunter
Shewhart和CUSUM控制图技术在制造业中得到了广泛的应用。然而，工件质量也大大提高了快速和精确的个别项目的测量和改进的自动动态机器控制。结果之一是工件质量控制工程师和他在连续过程工业中的工程师所面临的控制问题越来越相似。本文的目的是阐述一种控制图技术，可能是有价值的制造和连续过程质量控制工程师：指数加权移动平均（EWMA）控制图。EWMA起源于计量经济学家的早期工作，尽管它在质量控制中的应用已得到认可，但它仍然是一个被忽视的工具。EWMA图易于绘制，易于解释，其控制限易于获得。此外，EWMA自然导致一个经验的动态控制方程。
The Shewhart and CUSUM control chart techniques have found wide application in the manufacturing industries. However, workpiece quality has also been greatly enhanced by rapid and precise individual item measurements and by improvements in automatic dynamic machine control. One consequence is a growing similarity in the control problems faced by the workpiece quality control engineer and his compatriot in the continuous process industries. The purpose of this paper is to exposit a control chart technique that may be of value to both manufacturing and continuous process quality control engineers: the exponentially weighted moving average (EWMA) control chart. The EWMA has its origins in the early work of econometricians, and although its use in quality control has been recognized, it remains a largely neglected tool. The EWMA chart is easy to plot, easy to interpret, and its control limits are easy to obtain. Further, the EWMA leads naturally to an empirical dynamic control equation.