This generalized chart, is called herein the generally weighted moving average (GWMA) control chart.The GWMA provides a unified treatment of the special cases: the Shewhart X chart and the EWMA chart.
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- 最后,經(jīng)由所掌握之管制圖參數特性,組合一系列的X-GWMA管制圖進(jìn)行模擬評估,并得到平均連串長(cháng)度具良好特性之研究結果外,因可分別將兩種統計量及管制界限繪制于同一張管制圖內,而產(chǎn)生一張合并的管制圖。