控制圖的制作知識培訓

1、控制圖的制作知識培訓控制圖的制作知識培訓 G-2 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department2如何制作常規(guī)控制圖如何制作常規(guī)控制圖Section- II控制圖判定準則及注意事項控制圖判定準則及注意事項Section- III回顧柏拉圖回顧柏拉圖Section- I問題問題Section- IVG-3 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department3回顧柏拉圖回顧

2、柏拉圖Section- IG-4 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department4做柏拉圖前提首先要有什么？做柏拉圖前提首先要有什么？ 提示：提示：SPC七工具之一七工具之一G-5 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department5G-6 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engine

3、ering Department6DC Ionizer Redlight-awers main problems(total about 60%): Red alarm :13eaIonizer fan broken: 12eaFan noise: 10eaG-7 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department7如何制作常規(guī)控制圖如何制作常規(guī)控制圖Section- IIG-8 2008 SAE Magnetics (HK) LimitedPresented by SAE Indu

4、strial Engineering Department8 1.1 定義：控制圖又叫管理圖。它是用于分析和判斷工序是否處于控制狀態(tài)所使用的帶有控制界限線的圖 1.2 目的：消除系統(tǒng)性原因的影響，保持工序處于穩(wěn)定狀態(tài)而進行動態(tài)控制。預防壞品的產生。 1.3 原理：3 原理G-9 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department9G-10 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering De

5、partment10G-11 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department11G-12 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department12無無無無無數(shù)據個數(shù)上下控制線為什么這樣計算？上下控制線為什么這樣計算？G-13 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Dep

6、artment13USL:規(guī)範/設計上限 (UPPER SPEC. LIMIT)LSL:規(guī)範/設計下限 (LOWER SPEC. LIMIT)UCL:上限 (UPPER CONTROL LIMIT)LCL:下限 (LOWER CONTROL LIMIT)X :平均值 (MEAN , PROCESS MEAN)sd:標準差 (STANDARD DEVIATION )UCL = X + 3 , LCL = X - 3 , = Design Mean ( Xi - X )2 n-1 =G-14 2008 SAE Magnetics (HK) LimitedPresented by SAE Indus

7、trial Engineering Department14Xbar-ChartUCL=Xbarbar + A2 x Rbar =4.629 + 0.577x0.596 =4.97LCL=Xbarbar A2 x Rbar = 4.29R-ChartUCL= D4 x Rbar = 2.115 x 0.596 = 1.26G-15 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department15G-16 2008 SAE Magnetics (HK) LimitedPresented by S

8、AE Industrial Engineering Department16控制圖判定準則及注意事項控制圖判定準則及注意事項Section- IIIG-17 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department17控制圖是通過抽取總體的樣本數(shù)值進行判斷，既然是抽樣，就存在錯判()及漏判()的風險。為了取得更多的經濟利益，我們使用3來進行控制G-18 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineerin

9、g Department18任何點超越控制限控制上限以外控制上限以外Outside the Upper Control Limit8.08.18.28.38.48.58.68.7123456789 10 11 12 13 14 15LCLAverageUCL控制下限以外控制下限以外Outside the Lower Control Limit8.08.18.28.38.48.58.68.7123456789 10 11 12 13 14 15LCLAverageUCLG-19 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial

10、Engineering Department19連續(xù)七點向上或向下-走勢連續(xù)七點向下連續(xù)七點向下Downward run of seven consecutive points連續(xù)七點向上連續(xù)七點向上Upward run of seven consecutive points8.08.18.28.38.48.58.68.7123456789 10 11 12 13 14 15LCLAverageUCL8.08.18.28.38.48.58.68.7123456789 10 11 12 13 14 15LCLAverageUCLG-20 2008 SAE Magnetics (HK) Limit

11、edPresented by SAE Industrial Engineering Department20連續(xù)七點在平均值以上或以下-偏移連續(xù)七點在平均值連續(xù)七點在平均值以上以上Run of seven consecutive points above the average8.08.18.28.38.48.58.68.7123456789 10 11 12 13 14 15LCLUCL連續(xù)七點在平均值連續(xù)七點在平均值以下以下Run of seven consecutive points below the average8.08.18.28.38.48.58.68.7123456789 1

12、0 11 12 13 14 15LCLAverageUCLAverageG-21 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department21參考附件：G-22 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department221.注意根據計量、計數(shù)、計點等選擇合適的控制圖2.控制圖必須有控制線3.控制線可以根據一段時間的生產變化更改G-23 2008 SAE Magnetics (HK) LimitedPresented by SAE Industrial Engineering Department23問題問題Section- IVG-24 2008 SAE Magnetics