1、1,FMEA,FMEA/CA/PA An FMEA can reduce or eliminate the chance of implementing a preventive/corrective change which would create an even larger concern.,2,FMEA,Communication & coordination should occur between all type of FMEA ( i. e. DFMEA, PFMEA, MFMEA, ),3,FMEA,FMEA program is timeliness Is “bebore
2、-the-event” action, not an “after-the -fact” Up front time product/process change can be most easily and inexpensively implemented, with minimized late change crises.,4,When should a FMEA be started,All FMEAs (DFMEA, PFMEA,) might be started at the same time. The earlier, the better. The Process FME
3、A should be initiated: before or at the feasibility stage, prior to tooling for production,5,FMEA process sequence,SAE_FMEA_draft_std.PDF p4,6,When should a FMEA be generated What should be the scope of FMEA,There are three basic cases for which FMEAs are generated, Case 1: New designs, new technolo
4、gy, or new process. The scope of the FMEA is the complete design, technology or process.,7,When should a FMEA be generated What should be the scope of FMEA,Case 2: Modifications to existing design or process (assumes there is a FMEA for theexisting design or process). The scope of the FMEA should fo
5、cus on the modification to design or process, possible interactions due to the modification, and field history.,8,When should a FMEA be generated What should be the scope of FMEA,Case 3: Use of existing design or process in a new environment, locationor application (assumes there is an FMEA for the
6、existing design or process). The scope of the FMEA is the impact of the new environment or location on the existing design or process.,9,The application of FMEA,MFMEA System FMEA Containment FMEA Service FMEA ,10,SYSTEM FMEA,p51,11,DFMEA Failure Mode,Design Objectives (a statement of design objectiv
7、es is often helpful) -FUNCTION 1 FAILURE MODE A FAILURE MODE B etc. -FUNCTION 2 FAILURE MODE A FAILURE MODE Betc. - etc. Refer SAE p53,12,Summary Slide,PFMEA Failure Mode,13,PFMEA Failure Mode,Identifies process variables on which to focus process controls.,14,Effect,FTA ETA Bouline Algebra,15,Curre
8、nt Control,Prevention (first priority/prefer approach) Detection,16,RPN/S/O/D- the ratings are subjective,It is not appropriate to compare the ratings of one teams FMEA with the ratings of another teams FMEA, even if the product/process appear to be identical, since each team environment is unique a
9、nd thus their respective individual ratings will be unique (i.e., the ratings are subjective).,17,Mr. FMEA (FMEA facilitator),Unless the responsible engineer is experienced with FMEA and team facilitation, it is helpful to have an experienced FMEA Facilitator assist the team in its activities.,18,RE
10、COMMENDED ACTION(s)-,Should be first directed at high severity regardless of the RPN, High RPN and other items designated by the team. With the intent of reducing Severity, then Occurrence and then Detection.,19,FMEA and other tools,QFD Perato FTA/ETA(Boulin Algebra) Poka-Yoke/Mistake Proof/Zero Qua
11、lity Control CA/PA Design Control Process Control Knowledge management/Lesson learned Database Supply Chain (supplier/organization/customer) vs Failure Mode/Effect/Cause,20,QFD,Identify function, customer expection, Identify potential failure mode,21,Perato,RPN/S/O/D rating, identify priority of CA/
12、PA,22,FTA/ETA(Boulin Algebra),Effect analysis,23,Poka-Yoke/Mistake Proof/Zero Quality Control,determine recommended action,24,CA/PA,FMEA identify opportunities for CA/PA,25,Design Control,identify potential failure mode in DFMEA,26,Process Control,identify potential failure mode in PFMEA,27,Knowledg
13、e management/Lesson learned,team effort,28,Database,living document, to be updated,29,Supply Chain,supplier/organization/customer vs Failure Mode/Effect/Cause,30,Criticality analysis,Criticality. A relative measure of the consequences of a failure mode and its frequency of occurrences. Criticality a
14、nalysis (CA). A procedure by which each potential failure mode is ranked according to the combined influence of severity and probability of occurrence.(p44/80-mil 1629a) Severity. The consequences of a failure mode. Severity considers the worst potential consequence of a failure, determined bythe de
15、gree of injury, property damage, or system damage that could ultimately occur.,31,Try to give FMEA a definitionWhat is FMEA ?,32,FMECA MIL-STD-1629A,The failure mode, effects, and criticality analysis (FMFCA) is an essentialfunction in design A design tool,33,What is FMEA,A living document A design tool A systemic, disciplined problem preventing method,
