FMEA嚴重性評估參考標準(中英文)

FMEA嚴重性評估參考標準(中英文)FMEA嚴重性評估參考標準(中英文)FMEA嚴重性評估參考標準(中英文)資料僅供參考文件編號：2022年4月FMEA嚴重性評估參考標準(中英文)版本號：A修改號：1頁次：1.0審核：批準:發(fā)布日期：SuggestedFMEASeverityEvaluationCriteriaFMEA嚴重性評估參考標準Effect后果Criteria:SeverityofEffect標準：后果嚴重性Thisrankingresultswhenapotentialfailuremoderesultsinafinalcustomerand/oramanufacturing/assemblyplantdefect.Thefinalcustomershouldalwaysbeconsideredfirst.Ifbothoccur,usethehigherofthetwoseverities.此評分因潛在缺陷模式導致最終客戶和/或一種制作/安裝缺陷而產(chǎn)生。通常會首先考慮最終客戶。如果兩者均有，采用其中較嚴重者。(CustomerEffect)（客戶的后果）Criteria:SeverityofEffect標準：后果嚴重性Thisrankingresultswhenapotentialfailuremoderesultsinafinalcustomerand/oramanufacturing/assemblyplantdefect.Thefinalcustomershouldalwaysbeconsideredfirst.Ifbothoccur,usethehigherofthetwoseverities.此評分因潛在缺陷模式導致最終客戶和/或一種制作/安裝缺陷而產(chǎn)生。通常會首先考慮最終客戶。如果兩者均有，采用其中較嚴重者。(Manufacturing/AssemblyEffect)（制作/裝配后果）Ranking評分Hazardouswithoutwarning無預兆性危險Failuremodeaffectssafevehicleoperation,causesomefunctionalandreliableproblemsofoperation/orinvolvesnoncompliancewithgovernmentregulationwithoutwarning缺陷模式在無警告的情況下影響產(chǎn)品的安全操作、給用戶造成操作不便及可靠性問題/不符合政府條文，嚴重性非常高Mayendangeroperator(machineorassembly)withoutwarning無警告的情況下危害操作者（機器或裝配）10Hazardouswithwarning有預兆性危險Failuremodeaffectssafevehicleoperationandcausesomefunctionalproblemattheenduser/orinvolvesnoncompliancewithgovernmentregulationwithwarning缺陷模式在有警告的情況下影響產(chǎn)品的安全操作、在最終用戶處引起功能上的問題/不符合政府條文Mayendangeroperator(machineorassembly)withwarning有警告的情況下危害操作者（機器或裝配）9Veryhigh非常嚴重Vehicle/iteminoperable(lossofprimaryfunction)產(chǎn)品不可用（失去基本功能）100%ofproducthavetobescrapped,orrepairtimeexceedsonehour100%的產(chǎn)品可能需要報廢或修理時間超過一小時8High嚴重Vehicle/itemoperablebutatareducedlevelofperformance.Customerverydissatisfied產(chǎn)品性能下降、客戶非常不滿Producthavetobesortedandaportion(lessthan100%)scrapped,orrepairedtimebetweenoneandhalfanhour產(chǎn)品須分檢且部分（非全部）需報廢、修理時間在半小時至一小時間7Moderate中等Vehicle/itemoperablebutcomfort/convenienceitemsinoperable.Customerdissatisfied產(chǎn)品可使用但使用不便，客戶不滿Aportion(lessthan100%)oftheproducthavetoscrappedwithnosorting,repairtimelessthanonehour部分產(chǎn)品需報廢，不需分檢，修理時間小于一小時6Low低Vehicle/itemoperablebutcomfort/convenienceitemsoperableatareducedlevelofperformance產(chǎn)品可使用且使用不便、表現(xiàn)不良100%ofproductmayhavetobereworked,產(chǎn)品可能需全部返工5Verylow很低Itemnormalperformancethroughbeingrepaired.Defectnoticedbymostcustomers(greaterthan75%)產(chǎn)品經(jīng)過修理表現(xiàn)正常/大部分客戶發(fā)現(xiàn)缺陷（超過75%）Productmayhavetobesorted,withnoscrapandaportion(lessthan100%)reworked產(chǎn)品經(jīng)過分檢，無報廢、部分須返工（不到100%）4Minor輕微Itemoperableanddoesnotconform.Defectnoticedby50%ofcustomers.產(chǎn)品表現(xiàn)正常但使用不便/50%客戶發(fā)現(xiàn)缺陷Aportion(lessthan100%)oftheproductmayhavetobereworked,withnoscrap,on-linebutout-of-station部分產(chǎn)品（不到100%）需要返工，無報廢在生產(chǎn)線上其它工序返工3Veryminor細微Normalperformance.Defectnoticedbydiscriminatingcustomers(lessthan25%)產(chǎn)品表現(xiàn)正常且可使用，有辯別力的客戶（不到25%）發(fā)現(xiàn)缺陷Aportion(lessthan100%)oftheproductmayhavetobereworked,withnoscrap,on-linebutout-of-station部分產(chǎn)品（不到100%）需要返工，無報廢在生產(chǎn)線上原工序返工2None無Nodiscernibleeffect無辯別的影響Slightinconveniencetooperation,noeffect輕微操作不便，無影響1

FMEAOccurrenceEvaluationCriteriaFMEA機率性評估參考標準Level級別Probability可能性LikelyFailureRates可能出現(xiàn)的缺陷機率(DPPM)以一百萬塊板里的缺陷數(shù)計（DPPM）PpkRanking評分Veryhigh非常高Persistentfailures缺陷持續(xù)不斷≥100perthousandpieces50000~100000＜1050perthousandpieces20000~50000≥9High高Frequentfailures缺陷頻繁出現(xiàn)20perthousandpieces10000~20000≥810perthousandpieces5000~10000≥7Moderate中等Occasionalfailures缺陷偶爾出現(xiàn)5perthousandpieces2000~5000≥62perthousandpieces1000~2000≥51perthousandpieces500~1000≥4Low低Relativelyfewfailures缺陷相對較少perthousandpieces100~500≥3perthousandpieces10~100≥2Remote幾乎不會Failureisunlikely缺陷基本不可能出現(xiàn)≤perthousandpieces1~10≥1缺陷機率簡算：1、假設抽檢板數(shù)量共58000塊，發(fā)現(xiàn)缺陷板數(shù)量116塊；2、計算缺陷板數(shù)量在總抽檢板數(shù)量里所占比例：=116÷58000=，即%；3、缺陷機率即缺陷的百萬分率（DPPM）=%×100,0000=200；4、核對機率性評估參考標準：缺陷機率200介于100~500之間，故機率性評分為3分；

SuggestedFMEADetectionEvaluationCriteriaFMEA檢測性評估參考標準Detection檢測性Criteria標準Inspectiontypes檢測種類Suggestedrangeofdetectionmethods檢測方法的建議范圍Ranking評分Error-proofed防錯Gauging量具ManualInspectionAlmostimpossible幾乎不可能Absolutecertaintyofnon-detection絕對不能檢測×Cannotdetectorisnotchecked不能檢測或沒有檢測10Veryremote很微小Controlswillprobablynotdetect控制方法可能檢測不出×Controlisachievedwithindirectorrandomchecksonly只能通過間接或隨機檢查來控制9Remote微小Controlshavepoorchanceofdetection控制檢測機會少×Controlisachievedwithvisualinspectiononly只能通過目視檢測來控制8Verylow很小Controlshavepoorchanceofdetection檢測缺陷及防止漏波機會少×Controlisachievedwithdoublevisualinspectiononly只能通過雙重目視檢測來控制7Low小Controlsmaydetect控制可能檢測出××Controlisachievedwithchartingmethods,suchasSPC用控制圖方法控制（如SPC）6Moderate普通Controlsmaydetect控制可能檢測出×Controlisbasedonvariablegaugingafterpartshaveleftthestation,orGO/NOgogaugingperformedon100%ofthepartsafterpartshaveleftthestation在產(chǎn)品進入下工序后進行抽樣測量來控制缺陷或在產(chǎn)品進入下工序后對產(chǎn)品百分百測量/不測量來控制缺陷5Moderatelyhigh較高Controlshaveagoodchancetodetect控制有較多檢測機會××Errordetectioninsubsequentoperations,orgaugingperformedonsetupandfirst-piececheck(forsetupcausesonly)在下工序的誤差檢測，或在準備生產(chǎn)時進行測量及首板檢查（僅由設置引起）4High高Controlshaveagoodchancetodetect控制有很多檢測機會××Errordetectionin-station,orerrordetectioninsubsequentoperationsbymultiplelayersofacceptance:supply,select,install,verify.Cannotacceptdiscrepantpart在本工序的誤差檢測，或利用多層驗收后在下工序進行誤差檢測，供應，選擇，安裝，確認，不接受不合格產(chǎn)品3Veryhigh很高Controlsalmostcertaintodetect控制幾乎肯定能檢測出××Errordet