fmea培訓教材(英文版)(存儲版)
【正文】 unctions (VERBNOUN) ? Document individual functions by asking “How is this function achieved?” ? Repeat left to right, until actionable level ? Work right to left and check structure by asking “Why is this function included?” ProductFMEA – Functions Description Level 1 Description Level 2 Function Mode of Failure Effect Cause Action/ Solution Resp. Front Button Tekst clear visible after PQRtest MC ML P Potential failure Modes No function Partial function Failure Mode Type Example Not operational Not all of function operating Failure Modes: Frontbutton No function No tekst available Partial function Tekst partial available Function: Tekst clear visible after 100x cleaning. Failure Mode Type Example ProductFMEA – Modes of failure Description Level 1 Description Level 2 Function Mode of Failure Effect Cause Action/ Solution Resp. Front Button Tekst clear visible after PQRtest Tekst unreadable MC ML P Effects failure What are the effects of the failure relating to: another part the plete assembly the customer the enduser the governmental regulations ProductFMEA – Tabel of effects Failure Mode Tekst unreadable Frontbutton Complete Assembly Difficult to sale Customer Dissatisfied Enduser Dissatisfied Governmental regulation None Another part None ProductFMEA – Effects of failure Description Level 1 Description Level 2 Function Mode of Failure Effect Cause Action/ Solution Resp. Front Button Tekst clear visible after PQRtest Tekst unreadable MC ML P Assembly not possible to sale Customer dissatisfied Severity (Weightfactor) What is the severity of the effects? Criteria: Severity of effect Class Effect Accepted failure D None Safety failure S Unacceptable risk Nonconforming with safety Correction is nescessary A Relative big risk Correctie is remended B risico Correctie is nuttig C Ratingcriteria voor Severity (Weightfactor) Minimum risk Correctie is usefull Frontbutton/ Tekst readable after PQR test Failure Mode Tekst unreadable Effects Assembly: unsaleable (A) Customer: Dissatisfied (A) .: None (D) A Rating of Weightfactor– example Sev. Part Function ProductFMEA – Weightfactor Description Level 1 Description Level 2 Function Mode of Failure Effect Cause Action/ Solution Resp. Front Button Tekst clear visible after PQRtest Tekst unreadable MC ML P Assembly not possible to sale Customer dissatisfied A Potential Cause of Failure A weakness in the design with a failure mode as effect. Manufacturing misbuilds Due to design Deficiencies + + Manufacturing misbuilds Robust Design + + Use Fishbone Diagram Cause of failur
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