Re: [SI-LIST] : Bad IBIS models!

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From: Kim Helliwell ([email protected])
Date: Wed Mar 15 2000 - 14:03:03 PST

Dan (and the list)

I guess I'm reluctant to do this, as I'm not sure what purpose would
be served. Some of the vendors are actually aware they have problems
and are, to their credit, trying to fix them. My comments were aimed
at vendors who are (or appear to be) clueless about how these models
are actually used. But I don't think it would do to embarrass them
publicly. At least not yet!

In a sense, I don't know that I've found *ANY* vendor who supplies IBIS models
that are consistently good across the board. Vendors are not monolithic;
they have different product groups, and some groups do a better job than
others. If my comments can heighten the awareness of these vendors or
product groups, I will feel it was worth posting my diatribe. And I've
already had some indications that vendors themselves welcome this sort
of criticism as it helps them know how to do a better job.

So the best thing to do about it is to complain to the vendor whenever you
get a model that is not up to par. Let them know in specific detail what
is wrong, why it's wrong, and how it should be fix (if you know). Some
will push back, but the better ones will thank you I believe.

Dan Bostan wrote:
> Kim,
> Could you please provide a couple of embarrassing examples of companies that
> provide faulty IBIS models?
> Dan Bostan
> Corvia Networks

Kim Helliwell
Senior CAE Engineer
Acuson Corporation
Phone: 650 694 5030  FAX: 650 943 7260

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