過程失效模式及后果分析(pfmea)(ppt61)中英文(3)-資料下載頁

　　

【正文】 e to low chance ，可能性不大24 moderately to very high chance ，可能性較大 1 almost certainly (if the part passes this test, it39。s OK to ship)幾乎都可以查到 (如能通過這項檢測，則可放心發貨 )PFMEA Detection (D)Criteria InspectionTypes Suggested Range of Detection Methods　 A B C 　Almost ImpossibleAbsolute certainty of nondetection.　　 　　X Cannot detect or is not checked.Very RemoteControls will probably not detect.　　　　 X 　 Control is achieved with indirect or random checks only.RemoteControls have poor chance of detection.　　　　　X Control is achieved with visual checks only.Very LowControls have poor chance of detection.　　　　　X Control is achieved with double visual inspection only.LowControls may detect.　　　X　X　 Control is achieved with charting methods, such as SPC {Statistical Process Control}.ModerateControls may detect.　　　X　　　 Control is based on variable gauging after parts have left the station, or Go/No Go gauging performed on 100% of the parts after parts have left the station.Moderately High 　 　 　 Error detection is in subsequent operations, OR gauging performed on setup and firstpiece check (for setup causes only).Controls have a good chance to detect. X X 　High 　 　 　 　 Error detection instation, or error detection in subsequent operations by multiple layers of acceptance: supply, select, install, verify. Cannot accept descrepant have a good chance to detect. X X 　Very HighControls almost certain to detect.　X　X　　Error detection instation (automatic gauging with automatic stop feature). Cannot pass discrepant part.Very HighControls certain to detect.　X　　　　　 Discrepant parts cannot be made because item has been errorproofed by process/product design.Inspection Types: A. Errorproofed, B. Gauging, C. Manual InspectionPFMEA 12. Calculate the Risk Priority Number (RPN)計算風險順序數 (RPN)w RPN = S x O x D= Severity of Effect x Occurrence Rating x Detection Rating= 后果的嚴重度 x 原因可能出現的頻度x 探測度w Focus on high RPNs關注 RPN較高的項目 PFMEA 13. Remended Corrective Action推薦的糾正措施w Aim for PREVENTION rather than detection以 預防預防 而非探測為目的w Begin with the highest RPN items, 從 RPN高的項目開始Edon‘t set an a priori “cutoff” value (. prior to beginning the FMEA)，勿預先設定 “分數線 ”w Give serious attention to items with Severity = 9 or 10嚴重度＝ 9或 10時應特別注意PFMEAw What corrective action, if any, should be taken to reduce the，應采取哪些措施以降低 Eseverity (probably need a design change), 嚴重度（可能需修改產品設計） Elikelihood of occurrence, 頻度 Edetection rating，探測度 ? w You don39。t remend corrective action? Low RPN?你不建議采取糾正措施嗎？ RPN較低？EDon39。t leave the space on the form blank. Write None不要在表上留下空格不填。應填寫 “無 ”13. Remended Corrective Action推薦的糾正措施PFMEA 14. Responsibility and Target Dates職責和預定日期w FMEA is actionoriented ， FMEA以采取措施為宗旨 w Responsibility must be assigned and recorded, with dates，確定并記錄職責及日期E Assign to the person or group best suited for implementation 指定最適合履行職責的個人或小組E Person or group assigned should have been on FMEA team被指定的個人或小組應在 FMEA小組內工作過PFMEA 15. Corrective Action(s) Taken已采取的糾正措施w Recorded on the form，記入表內以便 E to track progress 追蹤進展情況E to document due care 說明 “應有的注意 ”w Completion date and a brief description完成日期和簡要說明 PFMEA 16. Recalculation of RPN重新估計 RPNw Evaluate the proposed corrective action評價建議采取的糾正措施w Then reestimate 然后重新評估Eseverity, 嚴重度Eoccurrence, 頻度Edetection， 探測度PFMEAw Recalculate the RPN ，重新估計 RPNw Verify improvement with supporting data!!!利用支持數據確認改進措施w Consequences，結果：E May reprioritize the failures有可能對失效重新排序E May lead to further corrective actions有可能需要進一步改進16. Recalculation of RPN重新估計 RPNPFMEA謝謝觀看 /歡迎下載BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAITH