15 Oktober 2014

FMEA and FMECA Process

Apa yang terjadi bila kotak hitam pada sistem helicopter gagal pada fungsinya ?

Apa efek yang tejadi jika card memory board pada kotak hitam gagal fungsinya?

Apa yang terjadi pada memory board jika componen elektronic nya gagal fungsinya?

Bagaimana dengan kualitas componen,...dst dst

The above example is a bottoms-up approach to a Design FMEA, but a tops-down approach could also be used. Also, the above example shows a hardware FMEA approach, but the system you are analyzing could represent hardware, functions, interfaces or a combination of all these items, which make up your design.

Facts and Tips About FMECA: 

  • FMECAs should begin as early as possible. This allows the analyst to affect the design before it is set in stone. If you start early, as you should, expect to have to redo portions as the design matures.
  • FMECAs take a lot of time to complete.
  • FMECAs require considerable knowledge of system operation necessitating extensive discussions with software/hardware Design Engineering and System Engineering.
  • Spend time developing ground rules with your customer up front.  

The FMECA Analysis Process:
    1) Define the system 
    2) Define ground rules and assumptions 
    3) Construct system block diagrams
    4) Identify failure modes 
    5) Analyze failure effects / causes 
    6) Feed results back into design process 
    7) Classify failure effects by severity 
    8) Perform criticality calculations 
    9) Rank failure mode criticality 
    10) Determine critical items 
    11) Feed results back into design process 
    12) Identify means of failure detection, isolation and compensating provisions 
    13) Document the analysis. Summarize uncorrectable design areas, identify special controls necessary to mitigate risk. 
    14) Make recommendations 
    15) Follow up on corrective action implementation / effectiveness

Be sure and visit our FMEA Examples page for additional FMEA information 
and FMEA examples.


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