【文章內(nèi)容簡介】 OTENTIAL O CURRENT E RPN FAILURE MODE EFFECTS OF CAUSE(S) OF CONTROLS FUNCTION FAILURE FAILURE SPINDLE ROTATES MEDIA AT FIXED RPM NO SPIN, OR DRIVE RUNS IN REVERSE DRIVE INOPERABLE FAILURE OF FLEX SOLDER JOINT DUE TO INSUFFICIENT STRAIN RELIEF RESISTANCE MEASUREMENT AT INCOMING INSPECTION EFFECTIVENESS OCCURRENCE SEVERITY Cause bees Failure Mode ABC 失效模式及影響分析 Failure Mode and Effects Analysis FMEA中的影響分析 PRODUCT: ABC STXXXXX SUBSYSTEMS SPINDLE MOTOR DESIGN FMEA DRAWING OR SPEC REFERENCE: Oklahoma City PROCESS DESCRIPTION POTENTIAL POTENTIAL S POTENTIAL O CURRENT E RPN FAILURE MODE EFFECTS OF CAUSE(S) OF CONTROLS FUNCTION FAILURE FAILURE SPINDLE ROTATES MEDIA AT FIXED RPM NO SPIN, OR DRIVE RUNS IN REVERSE DRIVE INOPERABLE FAILURE OF FLEX SOLDER JOINT DUE TO INSUFFICIENT STRAIN RELIEF RESISTANCE MEASUREMENT AT INCOMING INSPECTION EFFECTIVENESS OCCURRENCE SEVERITY Failure Mode bees Effect ABC 失效模式及影響分析 Failure Mode and Effects Analysis FMEA中的影響分析 PROVIDES A DEEPER LEVEL OF ANALYSIS BY ASKING YOU FOR THE DESIGN CAUSES AND VERIFICATION OF INSUFFICIENT STRAIN RELIEF PRODUCT: ABC STXXXXX SUBSYSTEMS SPINDLE MOTOR DESIGN FMEA DRAWING OR SPEC REFERENCE: Oklahoma City PROCESS DESCRIPTION POTENTIAL POTENTIAL S POTENTIAL O CURRENT E RPN FAILURE MODE EFFECTS OF CAUSE(S) OF CONTROLS FUNCTION FAILURE FAILURE SPINDLE ROTATES MEDIA AT FIXED RPM FAILURE OF FLEX SOLDER JOINT DUE TO INSUFFICIENT STRAIN RELIEF NO SPIN, OR DRIVE RUNS IN REVERSE CAUSING DRIVE TO BE INOPERABLE EFFECTIVENESS OCCURRENCE SEVERITY WHY? ABC 失效模式及影響分析 Failure Mode and Effects Analysis FMEA中的影響分析 PO W E RG A G ED E SI G NH A N D L I N GSE T U PC O N T A MI N A T I O NT O O L I N GO PE R A T O R E R R O R0 5 10 15 20 25 30 35 40 45 50過程失效原因的數(shù)目如下圖 (Pareto 圖 ) FMEA的失效模式的分析工具 失效模式及影響分析 Failure Mode and Effects Analysis 過程 FMEA 可以使用 Fishbone 進行分析從如下反面考慮失效原因 : OPERATOR SETUP MACHINE METHOD ENVIRONMENT MEASUREMENT FMEA中潛在失效模式分析工具 失效模式及影響分析 Failure Mode and Effects Analysis 失效模式 ? FMEA中目前控制方法 (Current Controls)一欄用到的分析工具，用于評估各種檢測失效的能力，防止不良產(chǎn)品流到客戶或下到工序 SPC Process Capability Gage RR Sampling Testing DOE FMEA中潛在失效模式分析工具 失效模式及影響分析 Failure Mode and Effects Analysis Rating Scale (等級的評定 ) Rating Severity of Effect Likelihood of Occurrence Ability to Detect10 Hazardous without warningVery high:Can not detect9 Hazardous with warningFailure is almost inevitableVery remote chance of detection8 Loss of primary functionHigh:Remote chance of detection7Reduced primary functionperformanceRepeated failuresVery low chance of detection6 Loss of secondary functionModerate:Low chance of detection5Reduced secondary functionperformanceOccasional failuresModerate chance of detection4Minor defect noticed by mostcustomersModerately high chance ofdetection3Minor defect noticed by somecustomers Low:High chance of detection2Minor defect noticed bydiscriminating customersRelatively few failuresVery high chance of detection1 No effect Remote: Failure is unlikely Almost certain detectionThe 1, 4, 7, 10 scale is generally considered to be the best option. 失效模式及影響分析 Failure Mode and Effects Analysis 每種失效模式都應(yīng)分析其 3重影響 : ?Local: 對本道工序有影響 ?Next Higher Level ： 對下道工序或裝配有影響 ?End User : 對終端用戶的影響 FMEA中的影響類型 失效模式及影響分析 Failure Mode and Effects Analysis PFMEA的風(fēng)險優(yōu)先指數(shù) (Disk Priority Number) RPN = O x S x D Occurrence x Severity x Detection FMEA的 RPN風(fēng)險優(yōu)先指數(shù) 失效模式及影響分析 Failure Mode and Effects Analysis DFMEA的風(fēng)險優(yōu)先指數(shù) (Risk Priority Number) RPN = O x S x E Occurrence x Severity x Effectiveness FMEA的 (RPN)的等級劃分： 風(fēng)險系數(shù) =嚴重度數(shù)失效產(chǎn)生頻度數(shù)缺陷被發(fā)現(xiàn)的概率 RPN= S O D 當失效模式按 RPN值排出先后次序后 ,應(yīng)首先對排列在最前面的事和最關(guān)鍵的項目采取糾正措施 . ●新產(chǎn)品