Chris Seider


  • @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]

  • I would stress @cseider question about having a champion.  You’re the new guy telling people that they should change the way they’ve always done things.  Who are you to do that?  You don’t even know what we do or why we do it this way.  From experience I’d recommend that you have at least two champions:  Someone in executive management and some…[Read more]

  • Things are fine on my end @cseider – hope all is well with you too.  As for the homework – it’s pretty quiet around these parts and I was feeling generous…    :-) 1 year, 8 months ago

  • @cseider – so, you’re telling me it aint?  Oh, I get it, +3 and -3 must be Zero sigma ;-} 1 year, 10 months ago

  • @cseider Just for clarification are you suggesting not check nor fixing the measurement system and just running nonparametric tests instead?

      1 year, 11 months ago

  • @rheaestrael Probably not much different answer than @Robert Butler or @cseider. You take everything you can get as far back as you can get it and plot it. No nonsense control chart stuff just a plain time series plot and look at it for patterns, trends, runs, shifts and cycles. Then you mark the things Robert suggested where the process has…[Read more]

  • @cseider Let’s see if I draw a line and mark 0 then mark off 1-10 at equal intervals on the line and then mark 3, 4.5 and 6 I might get a clue. 1 year, 11 months ago

  • @cseider – well, welcome back…question – your elapsed time for your most recent group of responses is 62 minutes, 57 minutes, 14 minutes, 8 minutes, and 7 minutes….what happened between 57 and 14?  Lunch break?  :-)

    Take Care

    P.S. where I work the IT department is really on the ball as far as fighting Covid is concerned.  This morning I lo…[Read more]

  • @cseider I have heard the one bite at a time as well. If you remember Brad from South Africa he used to say “invite the whole village.” 2 years ago

  • @rbutler, @Mike-Carnel, @Darth, @David007, @cseider

    @Sharmin, @BayanKamal, @paulchen, @jazzchuck, @Hajo, @Yeoh


    Yesterday 8 March 2020 a graduate of mine phoned me. We were remembering the time when several of my students were able to read PEER REVIEWED papers PUBLSHED in REPUTED Journals and to find the BMWs of the REPUTED Authors!!!!

    She…[Read more]

  • @KatieBarry











    Very good news for you………………………..

    Quality Engineering decided to REJECT my submitted paper on T CHARTS.

    Therefore you will not know the RIGHT Control Limits of T Charts (unless you read my books…)



  • @Mike-Carnel



    I just came across this BY CHANCE.

    The discussion was very illuminating for me.

    It CLEARLY explained why the “experts” were AND are UNABLE to understand that MINITAB provide WRONG Control Limits for T Charts……………… 2 years, 4 months ago

  • @stephanieareid I have not been on this site in a while and just rolled through a couple questions earlier today. I saw your response to MBBinWI. I am not sure how you got to the point that you felt in your obviously narrow view of the world that you could make such an arrogant and condescending remark to MBBinWI. First he has spent a lot of time…[Read more]

  • @stephanieareid – you really are a one-trick-pony, aren’t you?

    Each methodology has its utility and none are the be-all and end-all.

    For others reading this (old) thread, here is some nugget of learning I have managed to dig up over the years.  Different problems require different approaches.  Lean, as our friend stephanie seems so very fond o…[Read more]

  • @rbutler / @cseider – good to see the two of you are still here.  Hope you are doing well. 2 years, 5 months ago

  • @cseider


    You write “””doing a control chart on MTBF would seem to be a silly tool for practical use.”””

    I completely AGREE with you!

    But the question was not an engineering one!

    It referred to the incompetent analysis of the data by Montgomery, by Certified Master Black Belts, by Statisticians, by Minitab FANS….

    NOTICE the Montgomery’s (En…[Read more]

  • WOW!!!!!!  This thread is soooo coooool.  Reminds me of the good ole days when the argument was about the 1.5 sigma shift.  Only thing missing from this thread is Stan challenging Fausto to a duel and debate.  @rbutler  This is the most I have seen you write and argue in the many many years I have followed your posts.  Its been a blast.  I know t…[Read more]

  • @cseider, @mike-carnell, @rubtler, @darth, @Sharmin

    Statisticians and Master Black Belts

    As expected, MINITAB did not provide the THEORY of T Charts.

    They wrote to me: “”””Through our free tech support, we would not be able to have a discussion regarding the theory of T charts. We can show you how to use Minitab. If you’d like to research the t…[Read more]

  • @cseider, @mike-carnell, @rubtler, @darth, @Sharmin

    Is this twitter? :)

    NO it is not!

    It is the place where anyone can see IF people solve the Montgomery case of EXPONENTIALLY distributed data!!!


    @ Robert Butler I expected that you would not reply to the two simple questions!

    Waffling could not help you, in this case!

    My…[Read more]

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