I have never liked the 80-80 Rule as liberal as some may think it is. I've even toyed with the idea of writing a paper about it, but I think I'd go to sleep writing it, let alone presenting it.
If you take the basic premise statistically and work out the numbers yourself, you will surprised at the results. Say you have a given a total population of 100 products. In that total population, you expect 20 products to fail. Now, you take 5 samples from that population and calculate the probability of failure. The chances of 1 product failing in the 5 samples drawn is 42%. The probability of 2 products failing from 5 samples in the above example is 21%. IOW, you have a 1 in 5 chance of failing the 80-80 Rule by following it. That's bad. And if your company is into the practice of shipping relatively small amounts of product, that can be bad also. - Doug McKean ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
