From: StatMan <firstname.lastname@example.org> > > I'm fascinated. What sort of product allows for testing 100,000 pieces?
Easy: semiconductors! We produce incredible numbers of parts a month, and are still doing 100% screening in final test too.
Actually the customers *expect* defective parts to only occur at the 1/100,000 level nowdays. This level of quality is, unfortunately, beyond the reach of normal SPC programs since the "noise" there is considered to be 3/1000 ....
I am presenting a paper in Chicago that shows how, at least in semicondustors, to get rid of the quality inspection and still give estimates of the outgoing quality at this level and l ower. And no, it doesn't depend on SPC..... And yes, if the process drifts it's still OK.... And yes , in semiconductors I can tell you how to reach any ppm defective level you wish - it's a piece of cake to ca lculate. But more on that during my 20 minutes (or is it 15?) in August.