In my experience number 4 is the biggest issue.
4: the 'us' and 'them' syndrome (lack of appreciation or
understanding
> between disciplines of designers/layout people, bare board manufacturers
>
> and assembly manufacturers)
We have fairly good communication between design and manufacture and what we
feel is very good DFM and DFT guidelines that are widely utilized. However,
the design groups are under very different pressures then the assemblers.
Time to market has become an overriding issue. When a design does not meet
DFM or DFT, we frequently hear that the product cycle does not permit
redesign, or in many cases the circuit design must not change as it is the
only way to achieve the functionality required. Being from the assembly
side, there is little that can be communicated that will change those
positions, even if the design is introducing known assembly issues. The best
an assembler can do is document the impact at assembly and try to convey the
importance of DFM and DFT guidelines. The unfortunate side of it is that a
lot of shop and engineering resources are spent trying to work around a
known DFM violation. I realize my opinion is biased and as I say, design has
a different order of priorities than assembly. It is easy to state that the
priorities should be the same, but in my experience it just does not happen
that way.
Thanks,
Robert Furrow
SMT Process Engineer
978-960-3224
[log in to unmask]
> ----------
> From: Nils de Caluwe[SMTP:[log in to unmask]]
> Reply To: [log in to unmask]
> Sent: Tuesday, September 14, 1999 3:33 AM
> To: [log in to unmask]
> Subject: [TN] communication between design and manufacture
>
> Hello all,
>
> I've been one of the silent watchers of this forum for a while now but I
>
> decided to come out and ask some questions as well, so here goes:
>
> We are running a project here at the university of salford in the UK
> regarding implementing design for manufacture and test rules and
> guidelines and as such I have been looking at the communication (or lack
>
> of) between design and manufacturing in the electronics industry.
>
> During my research, mostly through interviews with people in the
> electronics industry I have recognised a number of possible reasons of
> why this communication is lacking and I'm looking for recognition,
> feedback or further examples of barriers.
>
> The reasons I came across are:
> 1: (physical) distances between companies (even though electronic means
> are available, a lot of people communicate better face to face)
> 2: fear of asking questions (people might not be sure of things but are
> afraid to ask because they think they may look stupid or not up to their
>
> job)
> 3: fear of giving away information (when working with a number of other
> companies, people might be afraid to give away too much information out
> of fear it may end up with their competitors)
> 4: the 'us' and 'them' syndrome (lack of appreciation or understanding
> between disciplines of designers/layout people, bare board manufacturers
>
> and assembly manufacturers)
>
> I know this is a very generic question, but I've noted several
> conversations on the subject, usually related to a direct technical
> problem, and it seems to me that this forum is a very good source of
> information because most people on here deal with these issues every
> day.
>
> I appreciate any feedback!
>
> cheers,
>
> Nils
>
> --
> ***********************************************************
> Nils de Caluwe
> Ing.
> Research Assistant
>
> Department of Aeronautical, Mechanical and Manufacturing Engineering
> The University of Salford
> Salford, Manchester, M5 4WT, United Kingdom
> Newton Building, Manufacturing Lab.
> Tel: +44 - 161 - 295 4562 Fax: +44 - 161 - 295 5575
> Website: http://www.salford.ac.uk/rdmm/ims/Midas1.htm
> ***********************************************************
> Life is what happens while you were busy making other plans
> ***********************************************************
>
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