[Kevin Hankins]

1. Go to http://www.aecouncil.com/data_analysis to get DE Histograms (free).
2. Click on “Give me some data in Excel”.
3.  Select some cells, and then click on “Normal Random Numbers Fill”.
4.  Find the range of your Sample from Step 3 (you can use Max()-Min()).
5.  Find the stdev() of the same Sample.
6.  Repeat.
7.  You will find that Rbar ~= stdev*d2.
d2(n) is listed in many statistics texts Appendices.
 

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[Kevin Hankins]

MBBs must have advanced applied statistical education or the equivalent.  An MBA would rarely satisfy this requirement.  There are several university statistics departments that could serve up the minimum “3 Graduate level Applied Statistics classes with a B or better” that I suggest.
Of course, this answers the “What do most companies look for” question only for regions that will be successful in contributing to a strong foundation for six sigma.
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What do most companies look for as far as credentials when hiring Master Black Belts (e.g. training, yrs. experience, certifications, number of completed projects or training waves, etc.)?

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[Kevin Hankins]

Correlation and regression are rich areas which need much applied R&D before they can be broadly and commonly applied in SS programs.
For instance, I have seen none of the available SS materials explain the difference in shape of the prediction intervals between correlation and regression.  Or that the univariate spec limits on which SS is based is an improper shape for any real product having multiple responses(rectangular cuboid vs proper ellipsoid).
Any MBB interested in helping me in this applied R&D, please email me.
Kevin HankinsMaster of [email protected]
 
 

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[Kevin Hankins]

The most successful will come from the top-down _and_ the bottom-up.  The top should, very early on in the SS program, broadly and deeply solicit any interested stakeholders to participate in an affinitization party from which the SS program can be defined.
To only be top-down, as are many SS programs, is to grossly offend your most experienced, valuable, existing (Master / Black / Green) Belts and other stakeholders that understand your business.  They will be driven out of your company very quickly, to other companies that must carefully balance hired help vs consultants.
 
 

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[Kevin Hankins]

The Six Sigma philosophy is to _understate_ your process by the 1.5 sigma shift.  You always shift the 1.5 toward the Customer Spec Limit.
Therefore, the Calculator is wrong.  It overstates the answer by 3.0 sigma, because the 1.5 should be -1.5, not +1.5.
 
Kevin Hankins
[email protected]

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