The Purpose of Control Charts

Quick Links

SPC for Excel Software

Visit our home page

SPC Training

SPC Consulting

Ordering Information

Thanks so much for reading our publication. We hope you find it informative and useful. Happy charting and may the data always support your position.


Dr. Bill McNeese
BPI Consulting, LLC

View Bill McNeese

Connect with Us

Comments (14)

  • AnonymousMarch 31, 2011 Reply

    Thank you for a very informative, explanatory and practical use of SPC Newsletter. Regards, Didrik Strand.

  • AnonymousMarch 31, 2011 Reply

    Dear Bill,

    I liked the newsletter it fitted in with my own ideas of using SPC for nearly 30 years. I also like the ideas of Donald Wheeler of trying to get the name control chart changed to a process behaviour chart, and that the aim of the SPC is to collect data to see how the process behaves over time, it was a shame it was ever called a control chart, but we have to live with it.

    Kevin Gardner

    • billApril 1, 2011 Reply

      Thanks Kevin. I also like Dr. Wheeler's desire to change from control limits to process limits. It is a better description of what the chart does. I see you had a comment on their blog. They did not post my comment.



  • billMarch 31, 2011 Reply

    This came to me via our contact us page:

    What restraint on a professional/personal attack of
    knowledge/experience via a “blogger”!
    I commend you for your professional response.
    The only thing better than offering some
    training to them, would be to offer it to their competitor for the particular
    processes this blogger says it can not be applied!

  • AnonymousApril 1, 2011 Reply

    I commend you for your restaint, I now see a development on the old addage on Lies and statistics,

    Lies, Damn lies and Statistics…..

    There are now lies about statistics

    Well done

  • AnonymousMay 18, 2012 Reply

    This is a really entertaining Article that you've put up there. I registered to your Page's RSS and hope you post more stuff that are equally perfect.
    Cheers ..

  • AnonymousMarch 30, 2018 Reply

    This is really informative,helpful regarding the control charts newsletter . Thanks a lot Bill.

  • sanuMay 17, 2018 Reply

    very helpful..

  • T. BaileySeptember 20, 2018 Reply

    Great information and thanks for sharing!

  • BFebruary 18, 2020 Reply

    This was a VERY helpful article.  We have a Quality Assurance Officer, who is using Control Charts to do with our lab results.  This makes it clearer what he is attempting to do with Control Charts.  I would have asked him directly but he has a tendency to drone on at length.  This just flat out made sense.  Thank you for posting this!

  • AnonymousApril 25, 2020 Reply

    Bill, thanks for sharing this. We need to do all we can to have control charts become a celebrated tool of management, not something to misuse and then abuse. My work is in performance measurement, and I find that control charts are fantastic to help managers see the true signals in their performance measures rather than reacting to every month-to-month difference (tampering). Don Wheeler’s book is fabulous, and XmR charts are really quite simple and perfect for most management performance measures. Loved your article, and intend to share it with my own subscribers. Smiles, Stacey Barr

  • SamuelNovember 5, 2020 Reply

    1. If we stop using control chart cos it's not working to achieve purpose, what else (based on yoir exprrience) would you suggest one use? 2. Does Control chart falls in the space of causality or causal analysis than correlations or 'statistical' analysis? Thanks alot.

    • billNovember 5, 2020 Reply

      If for some reason a control chart does not help you, then don't use it – but at a mininum plot the data over time.   Not clear on your second question but a control chart does not tell you a cause of anything – you have to find what causes out of control points.  So, it is more statisitcal analysis l think.

  • Rahul HaitJanuary 18, 2021 Reply

    Its reall y tremendous

Leave a Reply

Your email address will not be published. Required fields are marked *