In my mind, a quality procedure this complicated will normally provide an out for whoever is responsible for the issue.
Deming (the father of SPC) on the other hand gave us a straight forward statistical control process founded in statistical analysis and not an overload of forms or other superfluous paperwork that usually conceals the issue and root cause. Of course this requires engineers that have a strong current statistical background and a management team that has similar expertise. My personal experience suggest that these hyperbolic procedures are concocted by those who have a poor understanding of statistics or have bosses that are still trying to understand the difference between an average as opposed to a medium value.
Best regards
Lee
JLP Consultants LLC
804 779 3389
----- Original Message -----
From: Ken Bloomquist<mailto:[log in to unmask]>
To: [log in to unmask]<mailto:[log in to unmask]>
Sent: Thursday, March 19, 2009 11:29 AM
Subject: Re: [TN] Using CEM-1 in Pb-free Wave Solder?
Thanks Steve, great information well presented.
So if I understand correctly Sergeant Friday the PPAP(process) is complete
after the PPAP(package) is submitted with the PSW which includes the AECQ.
Ya gotta love this business ;-)
KennyB
-----Original Message-----
From: Steve Gregory [mailto:[log in to unmask]]
Sent: Thursday, March 19, 2009 7:58 AM
To: TechNet E-Mail Forum; Ken Bloomquist
Subject: RE: [TN] Using CEM-1 in Pb-free Wave Solder?
PPAP - Production Part Approval Process, is used in the automotive
supply chain to establish confidence in component suppliers and their
production processes, by demonstrating that:
"....all customer engineering design record and specification
requirements are properly understood by the supplier and that the
process has the potential to produce product consistently meeting these
requirements during an actual production run at the quoted production
rate."
PSW - Part Submission Warrant, The result of the PPAP process is a
series of documents gathered in one specific location (a binder or
electronically) called the "PPAP Package". The PPAP package is a series
of documents which need a formal approval by the supplier and customer.
The form that summarizes this package is called PSW (Part Submission
Warrant). The approval of the PSW indicates that the supplier
responsible person (usually the Quality Engineer) has reviewed this
package and that the customer has not identified any issues that would
prevent its approbation.
This is from:
http://en.wikipedia.org/wiki/Production_Part_Approval_Process<http://en.wikipedia.org/wiki/Production_Part_Approval_Process>
AECQ100 - Automotive Electronic Committee, Automotive quality is
governed by a set of various standards. The most frequent and recognized
one is the series of documents published by the Automotive Electronic
Committee (AEC). One of these is the AEC-Q100 which describes the tests
and conditions electronic components have to satisfy before the
automotive qualification can be pronounced. Different grades are defined
depending mainly on the operational temperature conditions.
This is from:
http://www.atmel.com/dyn/resources/prod_documents/doc7760.pdf<http://www.atmel.com/dyn/resources/prod_documents/doc7760.pdf>
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ken Bloomquist
Sent: Thursday, March 19, 2009 9:41 AM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: Re: [TN] Using CEM-1 in Pb-free Wave Solder?
Hi Ted,
I'm not in the automotive industry and I'm afraid some of your acronyms
have gone over my head, i.e. PPAP, AECQ, PSW, etc. They may not be
specific to the auto industry but I don't recognize them.
Could I get a short definition?
Thanks,
KennyB
-----Original Message-----
From: Ted Tontis [mailto:[log in to unmask]]
Sent: Thursday, March 19, 2009 6:50 AM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: Re: [TN] Using CEM-1 in Pb-free Wave Solder?
I work for a CM that has 75%-80% of the customer base as automotive. I
can tell you that the cost of changing a design is neither cheap nor
quick. 90% of the automotive assemblies we make are from customers that
assembly and sell the final product to the automotive industry. All
products must have a level 3 PPAP on the final assembly and a separate
level 3 on the bare boards. We have now reached a point that AECQ
information is required for all the components placed on the PCB and or
used on the final assembly to our end use customer. On average my full
level 3 PPAP's are 200+ pages and changes/amendments to the original
PPAP could be as short as a PSW or as large as 100+ pages. This doesn't
include what our customer or their final customer needs to do for their
final PPAP. So when something changes in the automotive industry it has
a ripple effect and everyone has to make changes or updates which
requires a lot of time and money.
I have been working with a customer that has had a design issue where
the terminal ends do not mate correctly. We notified them over a year
ago and provided supporting documentation from the supplier of the
terminal stating that it was incorrect, they are now just starting to do
something about it.
It's not as simple a changing or fixing the problem. It's like working
on a military project. One small fuse would require a pallet of paper
work and two years, minimal, for approval on changes and by that time
the product is no longer being produced.
Ted T.
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