Neubauer A S
Institut für Klinische Chemie und Pathobiochemie, Isar der Technischen Universítät München, Germany.
Clin Chem. 1997 Apr;43(4):594-601.
A quality-control chart based on exponentially weighted moving averages (EWMA) has, in the past few years, become a popular tool for controlling inaccuracy in industrial quality control. In this paper, I explain the principles of this technique, present some numerical examples, and by computer simulation compare EWMA with other control charts currently used in clinical chemistry. The EWMA chart offers a flexible instrument for visualizing imprecision and inaccuracy and is a good alternative to other charts for detecting inaccuracy, especially where small shifts are of interest. Detection of imprecision with EWMA charts, however, requires special modification.
基于指数加权移动平均（EWMA）的质量控制图在过去几年中已成为工业质量控制中控制误差的常用工具。在本文中，我解释了该技术的原理，给出了一些数值示例，并通过计算机模拟将EWMA与临床化学中目前使用的其他控制图进行了比较。EWMA图为可视化不精密度和误差提供了一种灵活的工具，是检测误差的其他图表的良好替代品，特别是在关注小偏差的情况下。然而，使用EWMA图检测不精密度需要进行特殊修改。
