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Severity rating

Six Sigma – iSixSigma Forums Old Forums General Severity rating

Viewing 21 posts - 1 through 21 (of 21 total)
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  • #53295

    shailee
    Member

    Hi
    In FMEA, on what bases we give rating to severity , occuarnce or detactability to a risk?
    Regards
    Shailee
    Β 

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    #189495

    Mikel
    Member

    Severity – VOC and data on customer / regulatory feedbackOccurrence – data on capability and defectsDetectability – MSA and data on escape rates

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    #189499

    shailee
    Member

    Hi Stan
    Thanks for the reply but i m sorry i m not getting ur
    answer can u explain or give some example?Regards
    Shailee

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    #189505

    Mikel
    Member

    Shailee,I’ve got nothing but time to do your work for you.Think about doing some reading for yourself and not expect to be
    spoon-fed.

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    #189509

    Marko
    Participant

    Keep spoon feeding her Stan. That’ll help.Β  Sometimes I think you just like the exposure.

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    #189515

    Mikel
    Member

    Yep,Exposure for an online persona. Makes me puff my chest out and want to brag about having access to
    Minitab 24.You are a frickin genius Marko, you saw right through me.

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    #189534

    shailee
    Member

    Hi Stan
    The things u told me is as written in the book too but
    i was not getting it properly so i asked.
    Well thats lot for ur precious time.Hi All
    Its still not clear to me can any one explain me.Shailee

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    #189537

    Stevo
    Member

    Your question is unclear.Β  So instead of asking you to clarify; I will ramble on what I think you should know.
    Β 
    An FMEA is nothing more than taken qualitative data and transforming it to (pseudo) quantitative data to understand and prioritize risk. Β But at the end of the day is still comes down to tribal knowledge (not that I have a problem with that Β– if you ask the right person to rate).
    Β 
    Stevo

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    #189541

    shailee
    Member

    Hi Stevo
    Thanks a lot for ur reply. Just to confirm , Is there
    any rules or standard which we use to rate severity of
    the future risk. For eg . If two people rate the same
    process risk to 5 and 7 which one will be correct ?
    What is the rule or norm that we follow for this
    rating ?
    Hope this time I successfully explain my question.
    Regards
    Shailee

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    #189543

    Mikel
    Member

    FMEA is not an opinion poll, when we get to the point of it being a
    working document vs a checked box (like SIPOC), it is based on data.The rating scales do need to be adjusted based on the industry. For
    example, in banking, bringing down the US economy while getting
    rich should be rated a 1 while only getting $15 mil out of a possible
    $20 mil bonus should be a 10 for severity.

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    #189545

    Stevo
    Member

    There should be standards set before the exercise. Β For example; a 5 = loss of 1,000 customers or 5 = can not detect until customer notification. Β But that standard is usually set by you.Β  IΒ’m sure there are industry recommendations you can research.
    Β 
    Stevo

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    #189546

    Stevo
    Member

    Let’s leave banking out of this.Β  The Auto industry is a much better example.
    Stevo

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    #189550

    alanj
    Participant

    Shailee,
    This link provides a straightforward explanation of Severity Ranking ..
    http://www.qualitytrainingportal.com/resources/fmea/form_46a_app4mod.htm
    Stan,
    You had it backwards … bringing down US economy would carry the higher severity (rank of 10 perhaps), while the bonus example would have a rank of 1 (unless it wasΒ my bonus).
    When we multiply the Severity x Occurence x Prevention/Detection ratings, we arrive at the rpn (Risk Priority Number) … Severity and rpn then drive the priority ranking to address each failure mode … higher Severity/rpn, the more critical the issue.
    regards to all
    aj

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    #189551

    Andrew Banks
    Participant

    aj:I think you may have missed the sarcasm in Stan’s
    message…

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    #189565

    Darth
    Participant

    Stan, you know full well that I am just completing the Minitab 20 revision so your claim of having Version 24 is blatantly false.As to the poster’s question:
    1. First determine the appropriate scale whether it be 1-5, 1-10 or 1,3,9. No right answer here.
    2. Determine the appropriate anchors, that is the ends of the scale. In banking, the highest scale may be loss of business. In IT it may be system shutdown. In healthcare it is usually death. On the low end it might be that the customer never notices. You pick it based on what is critical to the organization.
    3. Now define the interim scale values or depending on the width of the scale, a few more anchor points. In many cases, you will deal with the high severity instances regardless of the value of the RPN calculation.
    4. The occurrence extremes should also be defined and based on some data.
    5. Likewise with control.

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    #189569

    Mikel
    Member

    I’d be careful here. Marko is on to us.

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    #189570

    Stan’s Colon
    Member

    Stan,
    What’s wrong with answering Shailee’s question? Doesnt it take more effort to write a lame remark then just being helpful and giving an honest answer?
    This message board is definetly a platform to boost your ego.
    -SC

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    #189571

    Mikel
    Member

    SC,What’s wrong with answering Shailee’s question? Doesnt it take more
    effort to write a lame critique then just being helpful and giving an
    honest answer? But then again, you probably don’t know the answer,
    do you?What’s wrong with telling the guy to do his own work and use his own
    brain? It’s how I learned and still seems to be effective.

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    #189617

    Jonathon Andell
    Participant

    Amidst all the flotsam and jetsam of the responses, Darth had the most practical input. Stan said something similar with his sarcastic banking comment, but Darth’s input was straightforward.

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    #189623

    MBBinWI
    Participant

    Jonathan:Β  What are you, the official play-by-play announcer?

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    #189624

    Jonathon Andell
    Participant

    Good one!It just seemed there was a lot of discussion about “me,” “you,” and “him/her” mixed in with some useful facts. I thought I’d try to give the originator of this tangent-laden discussion some idea where to find the answer to the question.If I start sounding like Howard Cosell, it will be time to reconsider things big time!

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