Mirka,
We use Contract Manufacturers exclusively for all of our PWAs. Some things
you can consider :
1. Understand your P/O on what the acceptance criteria is. If a PWA
fails to perform a
defined acceptance criteria, then we don't pay for it and the CM
owns the scrap.
We do assist them in debugging to make it acceptable, but that is
our agreement on
any discrepant material. We don't tend to tell our CM how to do
their job, but we
do hold them accountable to performance criteria.
2. We reserve the right to perform a supplier survey on any PWB
supplier our CM might
want us to consider, and can approve or disapprove at any
time. We generally try
to use the CMs suppliers as we tend to get better pricing, but we
monitor all failures
and if a PWB supplier is not measuring up, we can disqualify them
from our products.
We do supplier surveys on both our CM and any of their suppliers
if we think it is
necessary. Substandard performance or recurring errors will
initiate a supplier
survey pretty quickly.
3. Track your performance and RCA-CA process with the
supplier. Initiate weekly/monthly,
quarterly or by lot performance reviews with your
supplier. Failure data and CA has a way
of telling you whether something is acceptable to you and if your
supplier is measuring up.
If they aren't, then you identify the CA needed to meet your
requirements and if that is not
done, you really need to consider taking your business to another
supplier that will measure
up to your requirements.
That in a nutshell is our general philosophy with CM's. We state our
requirements and work with them
to support their efforts. We review failures and work together to
improve. We also invite our key suppliers
to participate in our DFM/DFT reviews for new designs. It really helps to
have their input and preferences
during the design phase, and usually saves us some money with the assembly
pricing because we line
up with their processes and efficiencies.
If your CM is interested in keeping you as a customer, it works out pretty
well. At least is does for us.
Good Luck......DT
At 04:16 PM 7/17/00 -0400, you wrote:
>Hello Technetters,
> I changed jobs recently . In my previous position we
>assembled all our boards at house. We received the finished boards from
>board house and did
>QA on all boards received, which sometimes uncovered problems.
>In the new company the boards are ordered by the assembly house.
>I questioned the assembly house about the QA of the boards, and it seems
>like they just look
>at the boards. I am not very happy with this situation...
>According to the IPC specs the board house should inspect the boards,
>but from my
>previous job I know, that sometimes their inspection may not be
>sufficient.
>Could you let me know what is your experience and how do you handle
>this situation.
>
>Thanks a lot
>Mirka
>
>
>
>--
>| Mirka Halas TSI TelSys Incorporated |
>| Senior PCB Designer 7100 Columbia Gateway Dr. |
>| [log in to unmask] Columbia, Maryland 21046 |
>| http://www.tsi-telsys.com (410) 872-3900: Main |
>| (410) 872-3922: Direct (410) 872-3901: FAX |
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