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FMEA Analysis

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  • #43467

    sachin didolkar
    Member

      pl help me in FMEA analysis. I am  a beginer for this analysis.kidly start from basic.

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    #137908

    Andejrad Ich
    Participant
    #137916

    Pradeep Sharma
    Participant

    Sachin, start of with mapping your process in detail. List down all the process steps, list down all the potential failure modes (how that step can go wrong), list down all the potential cause against each failure mode (you can use cause and effect to know your causes), the list down all potential effect for each cause that is causing failure mode. Further list down current control against each potential effect. Get all the stake holders of the process, discus the potential failure modes, causes and effects you have listed down. Ask them to rate each potential defect, cause and effect in terms of Severity, Occurance and Detectibility. Calculate RPN. Prioritize RPN and discus recomended action plan for each potential failure modes. Design control plan based on your FMEA.

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    #137981

    Seth
    Member

    The FMEA concept is a very powerful one.  You are looking at how things can go wrong and what happens when they do.  You need to first identify all your process steps and then the Failure Modes for those steps.  The Failure Modes are the actual occurrences when something fails, not to be confused with the effect of that failure or the cause.  Next you will identify the Effect of the Failure Mode and score it based on how Severe that effect is to your overall process.  Next you will determine what can cause this failure to occur and score it on Occurrence, or how often that cause is present in your process.  Finally you will need to understand any controls you have in place to prevent or detect the cause or the failure and score it for detectibility.  Keep in mind that when you are scoring severity and occurence you want to assign a higher score for higher severity and occurrence rates, but for detection, if you have a high rate of detection the score will be lower.  Multiply these three scores for each input and you will have an RPN or Risk Priority Number.  The higher the RPN, the more critical that the issue is addressed.
    Check out http://www.sigmaflow.com if you would like to download a trial version software that will allow you to create a process map, assign input variables to your process steps, and then send those inputs to other tools such as C&E Matrix and FMEA.  It’s a good idea to narrow your inputs some before you do the FMEA to keep it a manageable size.  Good luck and have fun!

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