【正文】 ld be used由跨部門小組進(jìn)行wThe leader should be the processresponsible engineer小組組長應(yīng)是過程設(shè)計(jì)責(zé)任工程師PFMEA CrossFunctional Team跨部門小組w 59 people from， 59人，由從事如下工作的人員組成 E Design，設(shè)計(jì) E Assembly，裝配E manufacturing (operators, supervisors)，制造 (操作工，班組長 )E Industrial, mfg. And tool engineering，工業(yè)工程，工藝及工裝設(shè)計(jì)E quality，質(zhì)量管理E materials engineering，材料工程E Service personnel，機(jī)修E Supplier of product and machinery，零件和設(shè)備供應(yīng)商E Representatives from the next process, 后續(xù)工序代表PFMEA Process FMEA過程 FMEAw何謂 PFMEAw何時(shí)作 PFMEAw何人作 PFMEAw如何作如何作 PFMEAw16步工作步驟PFMEA How do we do a PFMEA? A Summary怎樣進(jìn)行 PFMEA？提要w Assemble the crossfunctional PFMEA team組建跨部門 PFMEA小組w List the failure modes, their effects, and their causes列出失效模式，后果以及原因PFMEAw Assess， 評估 Ethe severity of the effect (S) 后果的嚴(yán)重程度Ethe likelihood of the causes (O) 原因出現(xiàn)的可能性 Eand the ability of process controls to detect failure modes and/or their causes (D)過程控制探測失效模式和 /或原因的能力How do we do a PFMEA? A Summary怎樣進(jìn)行 PFMEA？提要PFMEAw Calculate the risk priority number (RPN) to prioritize corrective actions 計(jì)算風(fēng)險(xiǎn)順序數(shù) (RPN)以確定應(yīng)優(yōu)先采取的糾正措施w Plan corrective actions and assign owner制訂糾正措施并落實(shí)責(zé)任人w Perform corrective actions to improve the product or process, 采取糾正措施以提高產(chǎn)品和過程質(zhì)量w Recalculate RPN重新估算 RPNHow do we do a PFMEA? A Summary怎樣進(jìn)行 PFMEA？提要PFMEA How do we do a PFMEA?A Suggestion怎樣進(jìn)行 PFMEA？建議w Do your work on scratch paper first。s OK to ship)幾乎都可以查到 (如能通過這項(xiàng)檢測，則可放心發(fā)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(jì)算風(fēng)險(xiǎn)順序數(shù) (RPN)w RPN = S x O x D= Severity of Effect x Occurrence Rating x Detection Rating= 后果的嚴(yán)重度 x 原因可能出現(xiàn)的頻度x 探測度w Focus on high RPNs關(guān)注 RPN較高的項(xiàng)目 PFMEA 13. Remended Corrective Action推薦的糾正措施w Aim for PREVENTION rather than detection以 預(yù)防預(yù)防 而非探測為目的w Begin with the highest RPN items, 從 RPN高的項(xiàng)目開始Edon‘t set an a priori “cutoff” value (. prior to beginning the FMEA)，勿預(yù)先設(shè)定 “分?jǐn)?shù)線 ”w Give serious attention to items with Severity = 9 or 10嚴(yán)重度＝ 9或 10時(shí)應(yīng)特別注意PFMEAw What corrective action, if any, should be taken to reduce the，應(yīng)采取哪些措施以降低 Eseverity (probably need a design change), 嚴(yán)重度（可能需修改產(chǎn)品設(shè)計(jì)） Elikelihood of occurrence, 頻度 Edetection rating，探測度 ? w You do