Robert Butler


  • @Marc68 – I’m going to take exception to @cseider and @poetengineer in their guidance on this issue.  When determining calibration frequency there are two items to evaluate – the bias and precision.  While an MSA can help, it also introduces issues related to the human element, but that is not what calibration is about.  Calibration is about th…[Read more]

  • @ahamumtaz – You should go back and research the definitions of Cp, Cpk and Sigma that were provided to you.  You should find some verbiage that states something like: Cp is “potential” capability, whereas Cpk is “actual” or “observed” capability.  The difference being the location of the distribution in relation to the target and upper/lower b…[Read more]

  • @derekkoz – as the learned @rbutler identifies, once you limit the number of decimal places you are going to use, you have created a discrete measure.  The key is whether the number of decimals is sufficient to provide the resolution needed to answer the question being investigated.  Now, don’t get me wrong, there are certainly absolute discrete m…[Read more]

  • @geozor – A good approach would be to do a root cause analysis, identifying the several contributors to the issue (a fishbone diagram would be a good approach).  Categorize the several contributors as to their likely impact.  Then select the one that is the greatest contributor and go after improving it so that it either no longer is a c…[Read more]

  • Sure you could.

    Just look at your data–if it’s reported/recorded to the nearest 5 or 10 or 100…then you won’t have the precision potentially to use as continuous.

    Don’t forget to do an MSA! 4 days, 15 hours ago

  • Check this website. or google…but lots of advice out there.

    Basically, find a project with measurable results, a manageable size, identify team members with a project champion and find an impactful goal and start there. 4 days, 15 hours ago

  • Look at the total ppm defective.  Translate between Cpk and sigma level…for that one side of the curve. 4 days, 15 hours ago

  • @davidgford iSixSigma has a weekly Insights newsletter that goes out on Mondays. It includes our featured article of the week, highlights recent discussions, and also includes news, jobs and upcoming events. You can sign up for it at this link: 6 days, 13 hours ago

  • Please use data for your FMEA ratings.

    Also, many pieces of equipment have recommended calibration frequencies that would be HARD to ignore.  However, have you considered use of SPC for monitoring the measurement systems.  This is a great tool to signal when calibrations are needed. 1 week, 4 days ago

  • Try working with a social organization you already are a participant.  I’m sure every organization could use some volunteer talents. 1 week, 4 days ago

  • It seems you do have a UCL. :)

    hope all is well with you @rbutler ! 2 weeks, 5 days ago

  • Consider looking up Z normal tables versus sigma and check out tables that don’t “shift” and then consider you will have SOME defect rate at both ends of the curve and add. 1 month ago

  • I’d highly recommend the beer exercise and other VERY basic lean concepts/training before having them do an exercise.  Also, do you have a champion for such production layout you are proposing? 1 month ago

  • @katiebarry  great advice to contact them directly about the calculator.

    hope you and your family are staying safe! 1 month ago

  • @Work_Hard

    Did you search the site before asking your first question? You should find recommendations in the archives. This is a topic that has come up many times over the years.

    You’d probably want to contact ASQ directly to confirm your calculator question. 1 month, 1 week ago

  • Nice idea for the 5S number exercise, @danroth 1 month, 1 week ago

  • @rbutler you are kind to help with homework. :)

    Stay safe and hope your family stays well! 1 month, 1 week ago

  • Color measurement exists.  Maybe see if you can get a variable data measurement device/panel and not have a scale.

      1 month, 1 week ago

  • No.

    However, I’d suggest you consider attaching a pdf or link or web address for link.  Hard to see what you are generating buzz about. 1 month, 1 week ago

  • Hi @SavvyHill

    Welcome to the forum! We’re happy to have you here.

    Sounds like you have some great experience to share. In addition to sharing insight on the forum, consider submitting an article or blog, too. 2 months ago

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