iSixSigma

FMEA Tool

Viewing 6 posts - 1 through 6 (of 6 total)
  • Author
    Posts
  • #27447

    Sonu S
    Member

    Does anyone have any suggestion regarding the customization of the rating criteria for Severity, occurence, detection in the FMEA tool?

    0
    #67248

    Praneet
    Participant

    Hi Sonu
    Can you be a bit more specific about to your request?? What do you mean by customisation of the FEMA tool??

    0
    #67250

    RAB
    Participant

    The main thing you want to get out of an FMEA is to identify those items which are high in severity, high in occurrences, on low in detection. Rath and Strong has an excellent guide of an FMEA rating scale.

    For Severity:
    10 – Injure a customer of employee
    6 – Result in partial malfunction
    1 – Be unnoticed and not affect the performance

    For Occurrence:
    10 – More than once per day (probability > 30%)
    6 – Once every 3 months (probability <= .03%)
    1 – Once every 6 – 100 years (probability <= 2 per billion)

    For detection:
    10 – Defect caused by failure is not detectable
    6 – Manual inspection with mistake-proofing modifications
    1 – Defect is obvious and can be kept from affecting customer

    Hope this helps.

    0
    #67259

    Marc Richarsdon
    Participant

    The Automotive Industry Action Group (AIAG) has an FMEA manual. It is based on Ford’s FMEA methods and is the standard for the Automotive Industry. That being said, I find it a little weak on the way they have you estimate the occurence ranking. I have tried to standardize it a bit more by considering the type of inspection (attribute, sampling plan, variable, etc.)

    Marc Richardson
    Sr. Q.A. Engineer

    0
    #67366

    Majed Khodr
    Participant

    I have read an excellent paper to this subject. I suggest that you go over it, it is a little bit involved but it might be useful. Burton H.Lee “Using Bayes Belief Networks In Industial FMEA Modeling And Analysis” Proceedings Annual Relaibility and Maintainability Symposium, PP 7-15, 2001.
    The author is a candidate in Mecahincal Engineering at Stanford University. He can help with some of the questions that you might have.

    0
    #67375

    K.S.Sathyanathan
    Participant

    Dear Sonu

    Are you asking for custamisation of process or design FMEA. Please clarify

    Regards

    sathya

    0
Viewing 6 posts - 1 through 6 (of 6 total)

The forum ‘General’ is closed to new topics and replies.