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bobdoering is appreciated, and has over 1700 Karma points.bobdoering is appreciated, and has over 1700 Karma points.bobdoering is appreciated, and has over 1700 Karma points.
bobdoering is appreciated, and has over 1700 Karma points.bobdoering is appreciated, and has over 1700 Karma points.bobdoering is appreciated, and has over 1700 Karma points.bobdoering is appreciated, and has over 1700 Karma points.bobdoering is appreciated, and has over 1700 Karma points.bobdoering is appreciated, and has over 1700 Karma points.

bobdoering bobdoering is offline

Stop X-bar/R Madness!!

About Me

  • About bobdoering
    Real Name
    Bob Doering
    Location
    LaGrange, OH
    Specialty / Field(s) of Expertise
    Statistical Process Control for Precision Machining, metrology, automotive quality systems
    Public Email Address
    [email protected]
    Company or School Name
    CorrectSPC: When Normal Is Not Typical
    Company Product(s), Processes and/or Services
    Precision machining SPC confusing not giving you valuable feedback? The problem is the distribution is not normal, but people are applying normal statistics and control charts to it and yielding wrong information. CorrectSPC is a technique that busts the myth of the normal curve in precision machining. It presents a technique that provides more information that is meaningful to the operator and the quality professional. No transformations, no defects, no extra cost! See movie on website for
    LinkedIn Page
    http://www.linkedin.com/pub/bob-doering/24/886/971
  • Signature
    If we didn't care, we wouldn't share. That's why we're there.

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  • Registration Date: 2nd May 2002
  • Referrals: 1

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Latest Blog Entry

Posted 17th May 2016 at 09:07 AM by bobdoering Comments 0
Capability indices and calculations are tough enough as it is, but a common approach of using Cpu or Cpl ("half Cpk's") is statistically incorrect. It assumes the data is normal - which is unlikely as you approach the physical limit (0 for...

Posted 17th November 2010 at 11:46 AM by bobdoering Comments 16
You might have had some SPC training in the past, but it probably skipped over the correct steps to implement charting on the shop floor. Check it out, here they are:

1. Develop the total variance equation (Yes! This is the very first...

Posted 1st March 2010 at 05:03 PM by bobdoering Comments 0
Posted in Uncategorized
When looking at goodness of fit statistics, what you are determining is the probability of whether the data does not fit the specific distribution. In Charles Annis page on Anderson-Darling, his Note 1 does a good job of explaining what you are really...

Posted 9th September 2009 at 12:07 PM by bobdoering Comments 0
Some folks were looking for some sample data of a precision machining process in control. Attached is such data, from an actual CNC turning of a forged blank. Feel free to ask me any questions in the forum!

Posted 28th March 2009 at 10:01 PM by bobdoering Comments 0
Statistical Process Control for Precision Machining - The Movie


You may have read the book, but now you can experience the movie. Check out the steps that will be taken to bring the story of Correct Statistical...
Recent Comments
Quote:
In Reply to Parent Post by carleycar

How can I define whether
...
Posted 13th June 2012 at 01:16 AM by bobdoering bobdoering is offline
How can I define whether...
Posted 12th June 2012 at 11:58 AM by carleycar carleycar is offline
Quote:
In Reply to Parent Post by alias710

Need one more help.
...
Posted 26th March 2012 at 02:27 PM by bobdoering bobdoering is offline
Quote:
In Reply to Parent Post by FredWest

I am trying to incorporate
...
Posted 23rd March 2012 at 08:48 AM by bobdoering bobdoering is offline
Quote:
In Reply to Parent Post by FredWest

I am trying to incorporate
...
Posted 22nd March 2012 at 12:04 PM by bobdoering bobdoering is offline

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