Sorry Mark ; my fault, Mr. Daniels is top WATCHMAKER ; the Gran
Complications are multifunctional (time, calendars, moons, zones)
wristwatches (nowadays).
You pointed correctly my expressions occasionally barely tail the ideas
(coding is a pain) .
Rest "should" be clear .
thanks

pk

-----Original Message-----
From: Paul Klasek
Sent: Monday, 25 October 1999 9:44
To: 'TechNet E-Mail Forum.'; [log in to unmask]
Subject: RE: [TN] PCB shop auditing


You two fellows (Mark & Joe) sure have a good rapport here .
I was going to desist (Inge does not like same old f's butting in all the
time);
but than came the word tickling me all the time reading your exchanges . End
use .
Joe 's got a very good point ; who is more qualified than the cook (hate
aluminium pots). Agree .
But it does have a twist .
The served may have a very discerning or specific palate ,
for a very good reason occasionally .
Audit ? One of wold's best (CORRECTION>watchmakers) (Mr. Daniels) workshop
producing grand complications of astronomical (literally) functions would
certainly not pass ISO audit . Yet the product is beyond understanding
(tolerances to .001 mm).

So we went touch different way bout the validations : CLEAR specs :
We asked the fab fellows (each >process line< separately) to describe the
process ; list equipment and materials used (by brand, not only type)and
give us standard approved samples .
Those (all) go through (one) metalography lab with (one set) calibrated
instruments (listed again) .
That gives us one (="true") reference of all samples .
Whenever anything changes (say brand of laminate, maintenance schedule, new
gear, etc.) the fab sends notification and subsequent sample to keep in
library (with solderability, crosscut, etc.)

I personally don't see much point in audits (pass the debilitating dinners,
that is); as Joe said,
looking at ocean gives little away even if you "know" it > it changes in
minor still critical details .
Went through shops where my shoes fell apart the same week (stitching
threads incompatible with Aqua Regia on the floor) producing perfect boards
; and super tidies with dilettante craftsmanship as well .

To sum it up Mark, SPC on every line supplying will get you there in much
more informed fashion than walking shafts with a canary .

cu mate


Paul Klasek
ResMed





-----Original Message-----
From: Richard Mark Mazzoli [mailto:[log in to unmask]]
Sent: Monday, 25 October 1999 8:10
To: [log in to unmask]
Subject: Re: [TN] PCB shop auditing


Hi Joe,

Thanks for your comments.  We appreciate the feedback.  Any other comments
from PCB manufacturers would be appreciated as well.  Hopefully we can get
some responses from end users as well.

Thanks

Mark Mazzoli

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