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Cataloging failure methods, failure modes, root cause types

  • 1.  Cataloging failure methods, failure modes, root cause types

    Posted 10-25-2022 04:56 PM
    Kindest greetings to all.
    We have a somewhat random collection of historical data of cataloged failures.  My goal is to group downtime entries and component replacements into a sensible group of categories.  I'm looking for a broadly accepted tree of commonly identified categories of reason for failure, so that we can Pareto our history and identify hot spots.
    Ideally, this would be something published as a standard or a spec, like ISO or a Milspec or something, but of course it doesn't have to be.
    My interest is in groups of
    > Failure modes
    > Failure causes 
    > Root causes
    > any similar category by which one might categorize downtime events or failure events 
    Thanks in advance for your interest
    Paul


    ------------------------------
    Paul Reins CMRP, CRL
    Reliability Engineer
    Virginia Beach VA
    ------------------------------


  • 2.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-26-2022 07:12 AM
    Paul,

    The ISO std 14224 Petroleum, petrochemical and natural gas industries - Collection and exchange of reliability and maintenance data for equipment provides defines a taxonomy for failure data collection. We used it as a basis (but not fully "by-the-book") to define multiple codes for equipment history data in SAP, including Equipment Category/Class/Type hierarchy, and codes for Components, Damage, Failure Mode, etc.

    I hope it helps
    Regards,



    ------------------------------
    Luiz Ventura CRE, CRL
    Senior Reliability Manager
    The Dow Chemical Company
    ------------------------------



  • 3.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-28-2022 03:48 PM
    Luiz,  Many thanks for your remark.  Yes, ISO14224 is one of our best anchors for guidance.  I gave that section of that standard another look and really liked the table of failure modes for rotating equipment.  Have a great weekend.

    ------------------------------
    Paul Reins CMRP, CRL
    Reliability Engineer
    Liebherr Mining Equipment
    Virginia Beach VA
    ------------------------------



  • 4.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-31-2022 08:21 AM
    You're welcome!  Glad to contribute.
    I wish success in your effort!!

    Regards,

    ------------------------------
    Luiz Ventura CRE, CRL
    Senior Reliability Manager
    The Dow Chemical Company
    ------------------------------



  • 5.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-26-2022 09:22 AM
    Hello Paul,

    I'm not sure whether it satisfies your requirements or not but I was thinking about Modern Reliability Block Diagram Modelling (RBDM) which is a powerful method of modeling how components and sub-system failures combine to cause system failure. It can can accommodate repairable systems and common failure modes as well as Partial failure (degraded performance). Outputs identify top downtime contributors and overall system availability across the analyzed operation and maintenance phase of the life cycle.

    ------------------------------
    Roy Hage
    Reliability Engineer
    Jbeil
    ------------------------------



  • 6.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-28-2022 03:50 PM
    Roy, Many thanks for your response.  Yes, we have used reliability block diagrams for tasks such as DFMEA.  Have a great weekend.

    ------------------------------
    Paul Reins CMRP, CRL
    Reliability Engineer
    Liebherr Mining Equipment
    Virginia Beach VA
    ------------------------------



  • 7.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-26-2022 10:01 AM
    Paul, 

    The right source depends a bit what you are going to use the data for?  "Failure modes" can be very detailed, or fairly general.  For example "Bearing failed" is not very detailed, "vibration over 0.25 in/s  in bearing" a bit more detailed, while "corroded inner race" is very detailed.  For the purpose of Preventive Maintenance set-up you need a less detailed "failure mode" than for RCFA in my experience.  

    We use a list of failure modes for the purpose of documenting PM's by component together with a training document for each component.  It is available for licensing.

    ------------------------------
    Torbjorn Idhammar
    President & CEO
    IDCON, Inc.
    http://www.idcon.com
    Raleigh NC
    ------------------------------



  • 8.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-28-2022 04:00 PM
    Torbjorn,  Many thanks for your response.  Our data would, at best, identify a failed bearing and would not offer detail as useful as your examples of vibration or a corroded inner race.  Trying to group and family data that isn't good enough to start with, nothing new.
    Have a great weekend.

    ------------------------------
    Paul Reins CMRP, CRL
    Reliability Engineer
    Liebherr Mining Equipment
    Virginia Beach VA
    ------------------------------



  • 9.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-26-2022 03:53 PM

    Hi Paul,

    Lots of good recommendations already provided here.  14224 is a good start although it takes work to tweak it for industries other than oil and gas, but is a great start.
    I'd look at FMEA's you've done and start getting failure modes there, hydraulic cylinder leaks - deteriorated seal.

    You can build or buy a library, then start cataloging the root causes from RCA's, deteriorated seal caused by wrong oil- poor oil handling - lack of proper training and instructions.  Was this a component, personnel, or training failure? just more for categorizing failures.
    There are library solutions out there like those from Idcon, SwainSmith and others, any off the shelf solutions will still require tuning to your use case IMHO.

    The key, again my opinion, to getting actionable information from historical data is to make the reporting easy. Having analyzed  a ton of work orders I am continually amazed by the lack useful failure codes and work order descriptions, Pump broke- Fixed pump, some of the the more frequent failure causes I've seen None & Other, Blank.  Remember keep it simple and build from there. Train your team on using your CMMS, explain why it is important  and then hold them accountable for using it properly.

    MIL-HDBK-2155 Failure Reporting, Analysis, and Corrective Action Taken gives a good overview of FRACAS.  @Ricky Smith has also done some great presentations on this topic.


    Hank Kocevar, CMRP

    Consultant/Owner, Guardian Technical Services, LLC



    ------------------------------
    Hank Kocevar,CMRP
    Consultant
    Guardian Technical Services
    hkocevar@guardiantech.org
    ------------------------------



  • 10.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-28-2022 04:02 PM
    Hank, it's always great to hear from you.  Yep, you've got it in a nutshell.  Make the people who capture the data want to tell you what really happened.  Problem is, you make it sound too darn easy.  Have a great weekend.

    ------------------------------
    Paul Reins CMRP, CRL
    Reliability Engineer
    Liebherr Mining Equipment
    Virginia Beach VA
    ------------------------------



  • 11.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 11-01-2022 07:31 AM

    Definitely not easy - it is a challenge until you get a small success story to build from, but you already know this.
    Keep moving forward Paul.


    Hank



    ------------------------------
    Hank Kocevar,CMRP
    Consultant
    Guardian Technical Services
    hkocevar@guardiantech.org
    ------------------------------



  • 12.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-26-2022 05:08 PM
    Paul, you may want to get a copy of "Machinery Failure Analysis and Troubleshooting" by Heinz Bloch and Fred Geitner. There are discussions in that boo how to classify failures and their causes.

    ------------------------------
    Bruce Hawkins, CMRP, CAMA
    cu77tiger55@yahoo.com
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  • 13.  RE: Cataloging failure methods, failure modes, root cause types

    Posted 10-28-2022 03:46 PM
    Bruce,  Thanks for your remark.  I got lucky and found a used copy for sale for cheap and I'll give it a good look early next month. 
    Have a great weekend.

    ------------------------------
    Paul Reins CMRP, CRL
    Reliability Engineer
    Liebherr Mining Equipment
    Virginia Beach VA
    ------------------------------