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From [log in to unmask] Tue Oct 1 16: |
55:16 1996 |
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I agree!
______________________________ Reply Separator _________________________________
Subject: Re: Differences in net lists
Author: [log in to unmask] at _INTERNET
Date: 9/30/96 5:40 PM
You bring up a problem that is as old as schematic capture itself.
What would help is if the schematic s/w vendors would add a feature
that once a random name was assigned, it became permanent.
> From [log in to unmask] Mon Sep 30 17:36:39 1996
> Resent-Date: Mon, 30 Sep 1996 19:25:42 -0700
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> Date: Mon, 30 Sep 1996 16:05:03 -0400
> To: [log in to unmask]
> From: Doug Brooks <[log in to unmask]>
> Subject: Differences in net lists
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> We are an independent Service Bureau
>
> A year ago we completed a board for a customer. The board had
> roughly 7200 individual nodes. Recently the customer asked
> us to incorporate revisions affecting approx 500 of those nodes
> (some parts deleted, several new parts + other changes.)
>
> Revisions are, of course, dynamic, so we received approx 4 up-dated
> net lists during the process. The problem is that he had numerous
> unnamed nets. The schematic capture system would assign random names
> to those nets each revision. Our system doesn't care if names change
> as long as the integrity of the overall net list is preserved.
>
> When we gave him the check plots he asked us for a printout of
> just the changes, presumably so he could check just those. Since
> most of the nets were renamed several times,
> we didn't see how we could meet his request, but he insists that we
> should be able to.
>
> So I'm looking for your input.
>
> 1. Isn't it the engineer's job to keep track of changes if he wants an
> audit trail?
>
> 2. And isn't our job to implement them and create a design that matches
> the netlist that he says is the final and correct one, but not to maintain
> his audit trail of changes? (in particular, a "net-diff" list from two
> net lists with randomly assigned net names?)
>
> 3. If a schematic capture system assigns names to the nets, isn't there
> a way to fix those assignments and make them permanent?
>
> I'm not looking for sides, here, but a way to see this problem coming
> and be able to solve it next time.
>
> Thanks for any input
>
> Doug Brooks
>
>
>
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