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Subject:
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 2 May 2000 19:06:02 +0300
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Richard, Philip

More than the components, there are big savings in the PCBs. Not only can you save on
surface area, but the fact that you have fewer holes to get in the way, you can often
reduce from 6 signal layers to just 4.

On the other hand, all the placement equipment is more expensive, the soldering process
is more complex with slightly higher fault rates, cleaning, if necessary is horrendous,
so it ain't all roses all the way.

Without concrete figures, some of my clients have mentioned an overall 5-10% drop in
costs (including amortisation), but only after the processes are fine tuned and run in:
expect an increase over the first 3-6 months. The biggest savings, if you are a large
producer is due to the fact that you stack the bare boards at one end of the line and
test the finished assemblies at the other end, with no human intervention between the
two.

FWIW

Brian

Richard Hamilton wrote:

> Philip,
>
> I know exactly from where you are coming!! Somewhat of the same scenario
> here.
>
> We are 'moving' into the SM scene reservedly. I am using the component cost
> issue to help support the need to change. Based on two non-scientific,
> unprofessional, apples to oranges (OK, OK, just wanted to get the point
> across!) comparisons, my survey with vendors two years ago indicated a 15%
> price reduction by going to SM components. Another survey I just did
> indicated a 25% reduction in cost by moving to SM.
>
> Like I said, this was not a scientific gathering of information, but based
> on our parts this increase in reduction means the pricing trend is moving in
> a direction that we should consider.
>
> >From the department of 'For What it is Worth', digest in good health!
>
> Richard Hamilton
> Clemar Mfg. / Rain Bird
> [log in to unmask]
>
> > -----Original Message-----
> > From: Philip Poling [SMTP:[log in to unmask]]
> > Sent: Tuesday, May 02, 2000 5:47 AM
> > To:   [log in to unmask]
> > Subject:      [TN] Cost Reductions from Converting to SMT
> >
> > Greetings TechNetters,
> >
> > I'm trying to justify changing some of our circuit assemblies from THT to
> > SMT.
> > They go into a 40 Ton vehicle, so saving weight or space isn't enough
> > justification.  I need to be able to show that, at least in some cases,
> > you can
> > reduce the cost of a circuit assembly by converting it to SMT.  For my
> > justification, I need to find some examples of how other companies have
> > actually
> > reduced the cost of a circuit assembly by converting it to SMT.
> >
> > Have any of you gone through this process and actually reduced the cost of
> > a
> > circuit assembly?  Was the savings significant?  Have any of you written
> > any
> > articles or reports that you could share?  Or, has anyone read any
> > articles or
> > books on the subject?
> >
> > I'd appreciate receiving any information and examples you have.  Exact
> > figures
> > are not required, just ballpark estimates of cost savings would be very
> > helpful.
> >
> >
> > Thanks,
> >
> > Phil Poling
> > United Defense
> > 4800 East River Road
> > Fridley, MN 55421-1498
> > 612-572-6533
> > [log in to unmask]
> >
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