Electronics Forum | Wed Jun 15 00:50:32 EDT 2005 | Frank
From my understanding: Sigma is the same as one standard deviation. So 3 sigma is the same as 3 standard deviations. It all boils down to how repeatable your machine is. Another way to look at it is the probability (or confidence) that the machin
Electronics Forum | Tue Jun 14 10:38:53 EDT 2005 | Stefan
500 rejected (?) per million placed components is a very good rate, considered that it would be better than 4 Sigma if you name it defects on the board. Or do I incorrectly convert ppm to dpm? * 3 Sigma 66,800 defects per one million opportuniti
Electronics Forum | Thu Aug 02 12:47:15 EDT 2012 | deanm
Even though I cannot answer your question about a good Six Sigma training course, our company has had training in lean which I felt was helpful. You stated that one of your goals was to reduce cost/waste. That goal seems to lend better to a lean ma
Electronics Forum | Fri Mar 19 14:25:07 EST 1999 | Mark Milward
Is anyone out there familar with the Quality system six sigma, velocity and first time pass(FTP). I'm aware of six sigma programs in SMT/PWA operations, but not the concepts surrounding velocity and FTP. I would appreciate someone pointing me in the
Electronics Forum | Thu Oct 16 14:12:36 EDT 2008 | evtimov
Hi, I think the standard was IPC 6850. But I will recommend to go directly with the sigma test. Place parts with the machine and measure the placement accuracy on another machine. 4-5sigma at 50um should be a good machine. If they have sigma in thei
Electronics Forum | Fri May 23 03:39:06 EDT 2003 | mantis
Hi Chris, I found this site to be very useful and explanitory while calculating the sigma level of or company. http://www.isixsigma.com/sixsigma/six_sigma.asp It has explanations on anything and everything process control related. Regards,
Electronics Forum | Tue Dec 01 11:29:34 EST 2009 | sigmaprint
Have you considered a refurbished SMTech Benchmark printer from SigmaPrint? http://www.sigmaprint.co.uk/sigma-news/pre_owned.htm
Electronics Forum | Tue Jan 13 08:08:37 EST 1998 | Vanessa Munoz
I have recently been put in charge of our SMT line. We have to developed a SPC. My questions are: q1. What are the �most� important parameters to monitoring and which of the control charts do you usually use depending of the parameter..? Our line is
Electronics Forum | Wed Jan 17 18:08:51 EST 2007 | John S.
We use a fairly simple system. IPC put out standards 7912A and 9261A to define opportunities. Basicly the "number of components" + "number of solder joints" = "number of opportunities." Some six sigma benchmarking studies indicated "Sigma Level" =
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