【正文】 ct of the potential failure mode 是指潛在失效模式后果的嚴(yán)重程度 . – Suggested Evaluation Criteria (Please refer to Page 35 of the FMEA MANUAL.) 推薦的評價準(zhǔn)則 . (請參考 FMEA手冊 ) – Similar to Design FMEA, but also considers operations/subsequent process operations. 與 DFMEA一樣 , 但應(yīng)考慮操作或下道工序操作 . 44 PFMEA 過程失效模式及后果分析 (13) Classification 分級 – Similar to Design FMEA 與 DFMEA一樣 . – If classification is made, notify responsible design engineer. 如果確定了某一分級 , 應(yīng)通知設(shè)計主管工程師 . – If classification is made, must be addressed in the Process Control Plan. 如果確定了某一分級 , 它一定要包括在過程控制計劃中 . (14) Potential Cause(s)/Mechanism(s) of Failure 潛在失效起因 /機理 – “ … how the failure could occur. ” “ … 失效是怎樣發(fā)生的 .” – Described in terms of something that can be corrected/controlled 應(yīng)用術(shù)語來形容那些可糾正或控制的機理或起因 – Requires determination of Root Cause 要求要決定根本起因 . 45 PFMEA 過程失效模式及后果分析 (15) Occurrence 頻度 (O) – If available, statistical data should be used 如果必要 , 可應(yīng)用數(shù)據(jù)統(tǒng)計 . – Suggested Evaluation Criteria: 推薦評價標(biāo)準(zhǔn) . Please refer to Page 39 of the FMEA MANUAL. 請參考 FMEA手冊第 39頁 46 PFMEA 過程失效模式及后果分析 (16) Current Process Controls現(xiàn)行過程控制 – There are three types of Process Controls/features to consider。 ? 推薦的評價準(zhǔn)則： (請參考 FMEA手冊的第 17頁 ) Probability of Failure Possible Failure Rates Ranking Very high: Failure is almost inevitable ? 1 in 2 10 1 in 3 9 High: Repeated failures 1 in 8 8 1 in 20 7 Moderate: Occasional failures 1 in 80 6 1 in 400 5 1 in 2,000 4 Low: Relatively few failures 1 in 15,000 3 1 in 150,000 2 Remote: Failure is unlikely ? 1 in 1,500,000 1 32 DFMEA 設(shè)計失效模式及后果分析 (16)Current Design Control 現(xiàn)行設(shè)計控制 ? Validation/Verification activities which will assure adequacy of design 設(shè)計確認(rèn) /驗證將保證該設(shè)計的結(jié)果是恰當(dāng)?shù)? ? Initial occurrence and detection rankings are based on these current controls 最初的頻度或不易探測度數(shù)取決于現(xiàn)行的控制方法 ? “ Current” is based on same or similar designs “ 現(xiàn)行”取決于相同或相似的設(shè)計 ? Remember: these are tests performed before part is released for production 切記：這些試驗是在零件被批準(zhǔn)生產(chǎn)之前進行的 33 DFMEA 設(shè)計失效模式及后果分析 ? There are three types of Design Controls/Features to consider。 ? 推薦的評價準(zhǔn)則： (請參考 FMEA手冊中第 13頁 ) Effect criteria : Severity of Effect Ranking Hazardous Very high severity ranking when a potential failure mode affects safe vehicle operation and/or involves without warning: nonpliance with government regulation without warning. 10 Hazardous with Very high severity ranking when a potential failure mode affects safe vehicle operation and/or involves warning: nonpliance with government regulation with warning. 9 . . . . . . Etc. 26 DFMEA 設(shè)計失效模式及后果分析 Suggested Evaluation Criteria 推薦的評價準(zhǔn)則 ? This is the suggested criteria 這是推薦的準(zhǔn)則 ? The team should agree on an evaluation criteria and ranking system, which is consistent, even if modified for individual product analysis 設(shè)計小組對評定準(zhǔn)則和分級規(guī)則應(yīng)意見一致，即使因為個別產(chǎn)品分析作了修改也應(yīng)一致。FMEA 失效模式及后果分析 OVERVIEW OF THE CHRYSLER/FORD/GM POTENTIAL FAILURE MODE AND EFFECTS ANALYSIS REFERENCE MANUAL 克萊斯勒 , 福特 ,通用的 潛在失效模式及效果分析參考手冊 概述 1 FMEA 失效模式及后果分析 ADDITIONAL ASSISTANCE 其他幫助來源 ? Chrysler 克萊斯勒 – Procurement and Supply(Supplier Development) 采購和供應(yīng) (供應(yīng)商開發(fā) ). ? Ford 福特 – Customer Division Supplier Technical Assistance(STA) 客戶部供應(yīng)商技術(shù)支持 . ? GM 通用 – Procuring Division Supplier Development contact 采購部供應(yīng)商開發(fā) For specific technical questions, contact the appropriate