At 10:10 PM 8/18/97 -0700, you wrote:
>ST@Electro-CADD,Inc. wrote:
>>    IMHO I think it would be of great service to all in this forum if we
>> shared our Schematic/Layout checklist's as well as non-propriatary
>> fabrication and assembly notes, for a variety of designs from simple double
>> sided to intense multi-layer including MCM,BGA,FLEX,RF,etc..  and compare
>> the possibilities of how it may help others in our field.  I am still
>> working on mine, and will post it to this group within the next day or two.
>> I would appriciate any comments or criticism.  This is something that has
>> usually been a guarded secret, but now that the world is communicating this
>> way, LET'S SHARE!
>
>
>It would be interesting to compare what most designers consider
>"industry standard" basic instructions to vendors for various
>types. I'm not exactly comfortable with my company's "notes block"
>but haven't gotten around to try revising it yet (still new here)
>
>As an ice-breaker, do you guys call out a general note like:
>"Fabricate to meet or exceed the requirements of... "
>
>or do you list every little thing separately and say:
>"material xxx per xxx spec"
>
>I would bet there are quite a few of us who use notes that they
>don't even know where they came from or why they say what they say.
>I'll be happy to post what we use and let everybody try to poke holes,
>criticize, suggest, whatever;
>(but I'm at home now, so maybe tomorrow at work, ok?
>
>In the meantime I'm also copying this to the designer's council,
>because there was another related discussion going on there.
>I think the question was "What do you ask the Engineer?" or
>something like that... okay, here's my two cents:
>
>
>=================================
>E N G I N E E R I N G   I N P U T
>
>General Rule: The more info you can wring out of the FIRST
>discussion of a new design, the more time you are going to save in
>the long run.
>
>Unfortunately, engineers never seem to want to VOLUNTEER this
>information, so you have to be on your toes and be assertive.
>Don't worry, as long as its a professional attitude and no blood
>gets spilled unnecessarily <grin>, the result should be less work
>for you, and eventually, more respect for your skills (whoa, was I
>dreaming again?)
>
>Anyway, you may also find that different engineers have their own
>ideas about what you need "just to get started". Whenever an
>engineer says "here's enough to get started", that should be a
>bigtime red flag; simply replace that line with "I don't have
>anything that you can make real progress on but if I give you this
>scratch paper I can at least tell my boss that the design is in
>layout, ok?". Ok, a step down from the soapbox, and here are some
>questions I try to ask consistently whenever I start a new design.
>Even if I know the engineer will not know the answers, I still
>ask. Maybe it cause him to remember something he was overlooking,
>or at least know what to expect next time he comes knocking on my
>door.
>
>Do you have a TITLE in mind?         kind of amusing when no one even
>                                     knows what to call the thing, eh?
>Have you assigned a Part Number?     usually NEVER, but I ask anyway
>What Revision Level?                 Don't assume "the obvious"
>Mechanical Questions, Who?           Save on future phone tag
>Part List or Data Sheets?            a killer subject, brace yourself...
>Board Dimensions, or "Same As"       can often use a previous design
>Design for InCircuit/Functional Test?
>Any Height Restrictions?
>Any Placement Keepout Areas?
>What size Mounting Holes?
>Should Mounting Holes be Grounded?
>Do you need Test Points
>Any Labels? Extra Text? Notes?
>Accessibility, Pots/Adjustable Comps
>Unused Inputs Tied High or Low?
>Any Isolation or Special Shielding?
>Multiple Grounds? Common Return Point
>Do you need Spares?
>Do you need Sockets?
>Connector Placement? Mating? Interferance?
>Any Thermal Considerations?
>Highlight HighCurrent/HighVoltage Nets
>Enough Decoupling?
>Critical Lines, Impedance Control?
>How Many to Order, How Soon            assume a schedule crunch
>High Volume in Product Life?           increasingly important
>
>I have all of these questions on the left side of a form, and the
>right side is an empty column for notes and any special
>instructions about the job (even if they come up days later).
>A copy of this form is easily passed along to the checker to make
>sure nothing the engineer requested was overlooked.
>
>Would like to hear other suggestions, comments, ideas.
>
>onward thru the fog.....                                  Jack
>
>Hi Jack,

Here is my updated list so far.

Steve T