Talk:Six Sigma

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Isn't there any criticism?[edit]

This sort of crap is a load of horse-shit, invented by idiots who have little to do and a lot of time on their hands, to invent garbage ideas to 'prove' their worth. Is there no criticism of this utter, absolute nonsense? it is used for the process improvement and helps in organization maturity — Preceding unsigned comment added by (talk) 15:32, 19 June 2011 (UTC) It has also been shown to save a remarkable amount of money for companies who have successfully implemented it. Like other quality methodologies, its value is only as good as its champion's commitment. — Preceding unsigned comment added by (talk) 19:52, 14 November 2011 (UTC) PLEASE STOP CALLING SIX SIGMA A "STRATEGY." IT IS NOT A STRATEGY. IT IS AN EFFICIENCY IMPROVEMENT PROCESS. — Preceding unsigned comment added by Skridgley (talkcontribs) 02:40, 24 February 2012 (UTC)

Large public companies are basically required to claim tangible results for unmeasurables. It's only remarkable that people take these reports of savings as actionable information. [ bÐ i ( 2014-04-20 12:48 UTC ]

one sigma vs. six sigma[edit]

If one sigma is 31% in this article, someone should specify how these sigmas are different from statistical sigmas where one sigma is around 68% of a population. KTHX. —Preceding unsigned comment added by (talk) 02:18, 10 May 2010 (UTC)

It's one sigma total on either side of the target; not one sigma on each side. Basically a half sigma in each direction. There's a chart on page 17 here that probably illustrates it better than I can explain. Kuru (talk) 00:20, 12 May 2010 (UTC)

I was confused as well by the assertion that only 31% of parts in a 1 sigma process are error free. It only makes sense within the (much) later discussion wherein the mean is shifted by 1.5 sigma. To state the 31% result without reference to the 1.5 sigma shift is confusing to those of us who aren't already black belts. —Preceding unsigned comment added by (talk) 19:14, 6 June 2010 (UTC)

Yes, this seems to cause confusion often. It's covered in the "Role of the 1.5 sigma shift" section here, but probably needs to be footnoted in the preceeding sections which will trip up other math majors. Kuru (talk) 15:33, 28 June 2010 (UTC)

That table is frankly terrible and needs to be fixed, preferably by someone who both understands standard deviations on a normal curve as well as how six sigma uses it. If the goal is to look at P(X>Xbar+s) then that needs to be written down. The current description where 69% is considered to be beyond 1 sigma doesn't make much sense(seeing as 1 standard deviation is 68.2 % of the population). If it's one directional that has to be explicitly stated as many people use 2-sided specs. Urgh.

Also, the assumption of normality shouldn't just be mentioned in the criticisms but in the definition of the system. That's not a small assumption. —Preceding unsigned comment added by (talk) 16:25, 18 May 2011 (UTC)

Total Failure[edit]

Does anyone else notice that before Six Sigma, Motorola were a microprocessor developer beloved by all, but since then they've become a shit phone company?

I think that's probably because the microprocessor development arm spun off as Freescale, which not because of anything SS did Cmactaggart (talk) 18:10, 15 August 2013 (UTC)

Yup, I think that just about sums the whole thing up, contributor. It's all a load of twaddle, job creation for many though ! The (American parent) company I worked for was, and probably still is, heavily into Six Sigma and steadily declined over a decade or so due to poor management. Interestingly, most of the management that moved on were SS black belts ! Cabinscooter (talk) 07:50, 10 December 2010 (UTC)

2011 Discussion - Certification[edit]

Unlike Project Management, HR or ROI Methodology, ix Sigma does not have a standard certifying body, there are several different organizations that certify individuals who complete the courses.

Based on this I added one of the recognized institutions that offers courses and certifications to those interested in Six Sigma training (green, black, master belts).

The link was removed the following day and tagged as commercial. I understand the desire to remove spammy links from the pages, but this is a legitimate university with a distinguished reputation and an online option, as many universities are moving to offer.

If you feel the link should not be included, that's ok. I feel it adds another option for those seeking professional education. — Preceding unsigned comment added by GoBlueWhite (talkcontribs) 19:21, 8 March 2011 (UTC)

Hi. It is certainly promotional to me, you are promoting this website as an authority on the subject.Pm master 10:03, 9 March 2011 (UTC)
The best solution is to restrict ourselves to certification bodies mentioned in independent reliable secondary sources. --JN466 22:29, 20 September 2011 (UTC)
This is still ongoing, with a number of prominent and not so prominent firms being added and re-added without independent, secondary sourcing. [1]. That is not okay. The ASQ and IQF are there by rights; they are mentioned as certifiers in many, many secondary sources that are independent of them. The cited book mentions the Juran Institute, Qualtec and Air Academy, which are also frequently mentioned in the literature. No others should be added without a secondary source, and evidence that they are at least equally prominent in the literature. Otherwise we will end up with a list of 50 companies, down to the Six Sigma trainer working from his garden office. --JN466 23:08, 12 July 2012 (UTC)

Only in the US?[edit]

Are there no certification or university pograms outside the US? — Preceding unsigned comment added by (talk) 14:44, 24 July 2013 (UTC)