田口实验方法简介(编辑修改稿)

田口实验方法简介(编辑修改稿)内容摘要：

(y3 y)2 +...(yj y)2 Rearrangement MSD = n (y1 y)2 +(y2 y)2 +(y3 y)2 +...(yj y)2 +(y1m)2 MSD = σ2 + (y1 m)2 Sensitivity Signal to noise Quality Loss Function DOE TAGUCHI METHOD(I) Smaller the better 而 MSD = Σ yi2 = y2 + σ2 1 n j I=1 例 L(y) Wave soldering 之不良率 L(y) = k y2 Ao = 225 Ao = ＄ 100 2 3 ∵ y = 2 Ao = ＄ 100 ∴ k = = k = ＄ 25 L(y) = k y2 = 25y2 如果 y = 3 L(y) = 25 X (3)2 = 25 X 9 = 225 yo2 Ao ＄ 100 4 K (MSD) for n pcs samples Ky2, K = for 1 pcs sample L (y) = Ao yo2 Quality Loss Function DOE TAGUCHI METHOD(I) Bigger the better L(y) Ao = ＄ 100 y yo (例如 :出貨量 ) MSD = Σ = (1 + ε+ ) 1 y 2 j I=1 K (MSD) where K( ) where k = Aogo2 for 1 pcs Sample L (y) = 1 n 1 yi2 1 y 2 σ2 y 2 Quality Loss Function 例題 假設波峰焊制程之 Nomial value of y(焊接爐之溫度 )為 240℃ , 已知對某產品之平均成本 (每片 )為 NT＄ 200而如果我們訂定 y 超出 240℃ 之 177。 20℃ 時 ,材料就得報廢 .試求 Quality Loss Function L(y) 本例屬於 Nomial the best Model因此 L(y) =k(ym)2 已知 當 y = 220℃ or 260 ℃ 時 L(y) =＄ 200 解 Tolerance = △ o = 177。 20℃ ∴ △ o = 20℃ Loss = Ao = L = ＄ 200 Ao = k(△ o)2 k =。