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- From: izahi@bsc.no (Raul Izahi Lopez Hernandez)
- Subject: Re: Does a 487sx shut down the 486sx??
- Message-ID: <1992Sep2.133141.24817@newsroom.bsc.no>
- Sender: usenet@newsroom.bsc.no (Usenet News Administrator)
- Organization: Bergen Scientific Centre, Bergen, NORWAY
- References: <1992Aug26.173519.22421@unislc.uucp> <1992Aug27.183804.8605@tandon.com> <GLEW.92Sep1091842@pdx007.intel.com>
- Date: Wed, 2 Sep 1992 13:31:41 GMT
- Lines: 27
-
- In article <GLEW.92Sep1091842@pdx007.intel.com> glew@pdx007.intel.com (Andy Glew) writes:
- > >Ah, but there is not more work, actually less. The reason that they
- > >offer this chip for less is that they don't have to spend the man-hours
- > >testing the coprocessor.
- >
- > Yeah... like maybe 1/10 cent per chip (test vectors are cheap)
- >
- > some stuff deleted...
- >Test vectors are cheap. But tester time isn't. Testers are often the
- >manufacturing bottleneck. When this is true, every time unit of tester
- >time is a time unit lost on the expensive machinery in the rest of the
- >fab - and that machinery costs out at one hell of a lot more than 1/10
- >cent per chip.
- >
- >"Buy more testers" is only part of the answer.
- >
- >(NB. by "tester" I mean test machinery, not human operators.)
-
- Good test vectors are NOT cheap, and they allow for shorter tester
- usage.
- Random, Pseudo-Random, and God forbid, sequential testing of all combinations
- might be cheap but consume a lot of tester time.
- --
- -----> All opinions expressed here are my own, not IBM's <-----
- Raul Izahi Lopez Izahi Engineering
- izahi@bsc.no IBM Bergen Environmental Sciences and Solutions Centre
- Thormoehlensgate 55, 5008 Bergen, NORWAY (47-5)54-4653
-