Quick search on “80/80 rule history” yields (for a start!): “It was named after it's founder, the Italian economist Vilfredo Pareto, back in 1895. He noticed that people in society seemed to divide naturally into what he called the “vital few,” or the top 20 percent in terms of money and influence, and the “trivial many,” or the bottom 80 percent.”
And then “The Pareto principle (also known as the 80/20 rule, the law of the vital few, or the principle of factor sparsity) states that, for many events, roughly 80% of the effects come from 20% of the causes. ... Pareto developed both concepts in the context of the distribution of income and wealth among the population.” So the “rule” seems to date back to the late 19th Century, although (obviously!) not in the context of EMC control matters. However, I’m guessing it was later adopted in that context as a reasonable “rule of thumb” for assessing how well or not products could be assessed as being compliant with EMC standards. I have absolutely no idea when that might happened, but I would suggest looking for/at documents that lead up to the earlier known emission standards in the commercial field (military field was, and still is, a rather different one). John E Allen W. London, UK. From: John Woodgate [mailto:[email protected]] Sent: 18 November 2019 19:47 To: [email protected] Subject: Re: [PSES] 80/80 rule I agree: I'm almost certain that it is German in origin, and I'm sure it dates back to the 20th Century, possibly as early as 1960. Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk Rayleigh, Essex UK On 2019-11-18 19:44, John Shinn wrote: If my memory serves me right, as I recall, the 80/80 rule was in at least one of the VDE standards regarding radiated emissions. I can’t recall the number or name. This is going back to the late ‘70s or so. John Shinn Retired Sent from my iPhone On Nov 18, 2019, at 9:55 AM, John Woodgate <mailto:[email protected]> <[email protected]> wrote: Can someone tell me when the 80/80 rule was introduced into CISPR standards and if possible, a bit more detail than just the date, please? -- Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk Rayleigh, Essex UK - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
