fmea失效模式效应分析(编辑修改稿)

fmea失效模式效应分析(编辑修改稿)内容摘要：

e modes, known and potential 7 List the effects, causes, and current controls for each failure mode 8 Assign ratings for Severity, Occurrence, and Detection 9 Calculate RPN 10 Decide on a threshold RPN 11 Prioritize based on RPN and severity, or as required by the customer 12 Identify corrective actions 13 Implement and verify effectiveness of corrective action 14 Complete the documentation 效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 42 F u n c t i o n F a i lu r e M o d e E f f e c t C a u s e C u r r e n tC o n t r o lsF u n c t i o n F a i lu r e M o d e E f f e c t C a u s eF u n c t io n F a i lu r e M o d e E f f e c tFu n ctio nFailure Mode Effects Analysis F a il u r e M o d e效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 43 F u n c t i o n F a i lu r e M o d e E f f e c t C a u s e C u r r e n tC o n t r o lsFailure Mode Effects Analysis S e ve rity Occurre nce De te ctio n = RPN val u e R a n kRating效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 44 F u n c t i o n F a i lu r e M o d e E f f e c t C a u s e C u r r e n tC o n t r o lsO c c u r r e n c eS e v e r it y D e t e c t io n R P N v a l u e= Ra t i ng R a n kFailure Mode Effects Analysis C orre c t i v e Ac t i o nV e r i fy t h e e ff e c t i v e ne s s O c c u r r e n c eS e v e r it y D e t e c t i o n R P N v a l u e= 效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 45 執行 FMEA的步驟 Step 1. 定義分析的範圍 Define the scope for the FMEA. Company Plant 1 Plant 2 Plant 3 Plant 4 PCB Line Power Supplies FHP Motors Op 10 Op 20 …. …. Op 250 效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 46 執行 FMEA的步驟 Level Focus Failure Cause Effect Mode System Factory (Plant 2) Late deliveries Low FPY Lost to customer on Line 2 business Sub System Line 2 (Power Supplies) Low FPY High Rework Late deliveries at / after testing Operation Testing High rework Testing results Low FPY Op 210 inconsistent Example of a Process Op 120 Op A20 Op A10 Op 10 Op 210 Op 240 Op 250 效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 47 執行 FMEA的步驟 Op 120 Op A20 Op A10 Op 10 Op 210 Op 240 Op 250 Machine Weld brackets Integration Testing Crate amp。 Ship Assemble Axle Mount Wheels System Boundaries 效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 48 執行 FMEA的步驟 Step 2. 確認核心成員 Identify team members, customer, and knowledge expert. Involve the customer in the process. Step 3. 決定各成員所扮演的角色與權責 Develop roles and responsibilities for team members. Leverage the strengths of each member. 效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 49 執行 FMEA的步驟 Step 4. 對製程研究分析 Study the product/process/service. All team members work to familiarize themselves with the product, process, or service. Step 5. 完成嚴重度 、 發生率 、 難檢度的評點表 Develop rating scales for Severity, Occurrence, and Detection. 效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 50 執行 FMEA的步驟 Causes Failure Modes* Effects Occurrence Detection Severity How frequent? Who has the most info? If eliminated, will failure be avoided? How easy to detect with current controls? Who has the most info? If prevented will effects be eliminated? How severe? Who has the most info? 效應分析 失效模式 2020年 7月 6日 Failure Modes and Effects Analysis 20xx/01/05 P. 51 執行 FMEA的步驟 Severity Occurrence Detection Effect Cause Failure Mode or Cause 1 Remote chance, 1 ppm 2 Very low 1 to 5 3 Very low 5 to 10 4 Moderate 10 to 100 5 Moderate 100 to 1K 6 High 1K to 10K 7 High 10K to 100K 8 Very High 100K to 1M 9 Very High 1M to 10M 10 Almost certain ……….. 1 Certain to be detected 2 Very high chance of detection 3 High chance of detection 4 Moderately high chance of .. 5 Moderate chance of detection 6 Low chance of detection 7 Very low chance of ... 8 Remote chance of …. 9 Very remote chance of ... 10 Slips by undetected 1 No effect 2 Minor effect fit / cosmetics 3 Major effectfit / cosmetics 4 Minor reduction in Function 5 Customer dissatisfied 6 Major reduction in function 7 Totally dysfunctional 8 Presents minor hazard 9 Presents injury hazard 10 Fatal if used Severity effect 1 No effect on operators, users, or current and down stream processes 2 Minor re work at current step / no dysfunction introduced in product 3 Rework at current / subsequent steps causing some delayed schedules, or product is rendered partially dysfunctional 4 Heavy rework at subsequent operation, major delays in schedules, or product function is severely impacted 5 Risk of injury or fatal Occurrence cause 1 Very rare occurrence, X00 ppb or once in 3 to 5 years。