【正文】 ood 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怎樣進行 PFMEA？提要PFMEAw Calculate the risk priority number (RPN) to prioritize corrective actions 計算風險順序數(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責任人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怎樣進行 PFMEA？提要PFMEA How do we do a PFMEA?A Suggestion怎樣進行 PFMEA？建議w Do your work on scratch paper first。 as the team reaches consensus, record the information on the FMEA form先在一張草稿紙上進行分析；當小組達成一致意見后，再將有關(guān)信息填在 FMEA表上E use fishbone and tree diagrams liberally 充分利用魚刺圖和樹形圖E trying to use the FMEA form as a worksheet leads to confusion and messedup FMEAs 若將 FMEA表當做工作單使用，就會造成混亂，使 FMEA一塌糊涂PFMEA Process FMEA過程 FMEAw何謂 PFMEAw何時作 PFMEAw何人作 PFMEAw如何作 PFMEAw16步工作步驟步工作步驟PFMEA 1. Assemble a team and plan your activities成立小組并制訂計劃w PFMEA must never be done by an individual, because 絕不能由個人單獨進行 PFMEA，因為： Eindividual efforts produce biased results,由個人進行會使結(jié)果出現(xiàn)偏差Eany actions will require buyin from various groups進行任何活動，都需要從不同的組織取得信息PFMEAw One person (. the leader) should be assigned to maintaining the FMEA form 應(yīng)指定一個人 (如組長 )保管 FMEA表格EBe sure to write the names and functions of the team members on the FMEA form應(yīng)將小組成員的姓名和職責填入 FMEA表格1. Assemble a team and plan your activities成立小組并制訂計劃PFMEA 2. Develop a process flow diagram 繪制過程流程圖wUse the Process Flow Diagram format 運用正規(guī)的過程流程圖Eidentifies fabricate, move, store and inspect operations 辨別四種作業(yè)類型Eidentifies Key Characteristics辨別關(guān)鍵特性PFMEA Supplier________________ Date_______________Part Number_____________ Revision Level______Part Description__________ Prepared by_________pressuremold partfab move store inspstep oper. descr. item KPC item KCCinspect partfor flashstore part in containercarry parts to assy area1 no flash 112342. Develop a process flow diagram 繪制過程流程圖PFMEA 過程流程圖過程流程圖mold part注塑零部件fab加工move搬運store存放insp檢驗step步驟oper. descr.作業(yè)說明item編號KPC item編號KCCinspect partfor flash檢驗零件有無飛邊store part in container將零部件放入周轉(zhuǎn)箱內(nèi)carry parts to assy area將零部件送往裝配區(qū)1 no flash無飛邊pressure壓力11234PFMEAPFMEA 3. List the function(s) of each operation列出每個操作的功能w A function is what the operation does 功能系指該操作所起的作用 w State the function as， 說明功能為：Verb + Object + Qualifier 動詞動詞 +賓語賓語 +修飾詞修飾詞 mold part，零件成型 crimp terminal onto cable 在線端壓接端子 form bend in part, 零件彎曲成型examples例如PFMEAwDon39。t fet auxiliary functions as well a primary functions基本功能和輔助功能都要考慮3. List the function(s) of each operation列出每個操作的功能PFMEA 4. List the quality requirements列出質(zhì)量要求w a customer want or desire顧客的希望或要求w could seriously affect customer perception有可能嚴重影響顧客的看法 w could lead to a customer plaint 有可能導致顧客投訴PFMEA 5. List the potential process failure modes 列出可能的過程失效模式w a defect, flaw, or other unsatisfactory condition in the product that occurs when the process fails to meet the process requirements由于過程未達到要求而導致的產(chǎn)品缺陷、瑕疵等不良狀態(tài)Efailure modes should be written in terms of the condition of the product失效模式體現(xiàn)在產(chǎn)品上PFMEAw Typical Failure Modes，幾種典型失效模式Ediameter out of spec.，直徑超差Emissing seal，漏裝密封墊Ecut strands，切破線皮Emisoriented part，部件方向錯Einsufficient solder，焊劑不足Etoo much solder，焊劑過量ENFO，未充滿EFlash，飛邊5. List the potential process failure modes 列出可能的過程失效模式PFMEAw Note，注 EAssume that ining product and materials are correct假設(shè)來料沒問題EAssume that the product as designed will meet requirements假設(shè)產(chǎn)品設(shè)計能夠滿足客戶需求5. List the potential process failure