SPC基本概念资料.pptVIP

K:\QA\Julie\SPC概論管制圖.ppt SPC基本概念課程教材 Statistical Process Control(SPC)統計製程管制 別名(Alias) PCS , Process Control System (製程管制系統) SQC , Statistical Quality Control (統計品質管制) What is SPC? Statistical Anything that deals with the collection, analysis, interpretation presentation of numerical data Gaining information for making informed decisions Process Combination of machines, tools, methods, materials people employed to attain process specification A similar procedure/event that is happening repetitively Control To keep something within a desired condition Make something behave the way we want it to behave Why do we Need SPC? We need it to reduce customer complaint/return scrap rate screening man-hours loss of equipment availability Customers ask for it “Don’t just tell us that your process/product is improving, prove it by showing data” Customer audit ISO Requirements Process Control (Element 4.9) The use of Statistical Techniques (Element 4.20) Advantages with SPC Good Process Control System Proactively control the process Work towards consistent product quality Continue to improve the process performance Provide information about process capability Reduce Cost Reduce scrap Reduce rework More Competitive Quality of product improved Reduced Inspection Vendor of Choice (VOC) 公司目前對SPC的規範及現況 An engineer who does not understand SPC is a DISQUALIFIED engineer in ASE! 相關的SPEC ASE SPEC# 22-21-0000-0005 Statistical Process Control Procedure - (日月光規格# 22-21-0000-0005 統計製程管制程序書) 此份SPEC涵蓋了所有ASE統計製程管制計劃,包括了所使用的基本技巧及手法 SPC 的實施要點 必須成立一統籌管理委員會來監督此系統的目標設定及推行,目前是由SPC委員會來擔任 由過去的良品率,品質狀況,失敗分析,及腦力激盪,決定出潛在性的問題,作為主要改善的項目 公司所有員工都必須接受訓練,讓每位參與製造的人員熟悉基本SPC的應用 列出重要的製程/參數並設定抽驗這些重要的製程/參數的方式 選擇適用的管制圖抽驗製程以確認是否在統計管制的狀態下,並於製程不在管制的狀態下採取適當的行動 計算製程能力指標(CPK)並作持續的改善,對於減少非機遇原因所造成的變異,則須由管理階層於例行會議中決策 維持最佳作業狀況的目標公差及特殊製程管制必須定義於適用的製程/品管的SPEC中 目前Wire Bond(A080站)的層別方式 備註:1. 班別分三班 , 2. 測試原因分換班,換產品(Device) , 換針 3. 每班測試人員須同一人 統計學基礎觀念 何謂統計學? 統計學(Statistics)是蒐集,整理,陳列與分析資料的一種科學方法,又可稱統計方法( S