Jorge

At your risk and peril :-)

A lot depends what you are making. To take the two extremes:
1. You are manufacturing Furbies or similar toys by the 100,000/month. A
failure of 1 or 2 per month is cheaper to replace under guarantee than
to take adequate quality qualification and assurance steps. You would
start to worry only if the failure rate of guarantee replacements
exceeded, say, 100/month.
2. You are manufacturing geostationary satellite telecoms relays where
repair/replacement is quasi-impossible. In this case, if you did not
take adequate measures to qualify and assure your quality, you would be
foolish.

In reality, you are probably somewhere between these extremes. It is
therefore up to you to decide what is an acceptable risk and what is not
and take measures accordingly.

Brian

Jorge Engenharia wrote:
>
>     Hello technetters,
>
>    All responses were related with some action involved, but what is the
> risks related for those people that DO NOTHING ?
>    There are a lot of small business that has no capability/knowledge to
> deal with this and only assembly the board following basics manufacturing
> process.
>
>     TIA
> Jorge Dourado de Santana
> Maintenance / Process Engr
> Microtec - Brazil
>
> > -----Original Message-----
> > From: Oberle, Wade [SMTP:[log in to unmask]]
> > Sent: 22 de Março de 2000 18:13
> > To:   [log in to unmask]
> > Subject:      [TN] process control of final cleanliness in a no-clean
> > world
> >
> > Dear technetters,
> >         How do all of you in the no-clean world monitor and control board
> > cleanliness.  In the days of OA flux, we used an Ionograph or Omegameter
> > to
> > monitor our 'cleaning' process.  Do some of you still use an ionic
> > contamination tester or do you use SIR testing or nothing or what?
> >
> > Thanks in advance for your advice.
> >
> > Wade Oberle
> >
> >
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--
Brian Ellis
Protonique SA
PO Box 78
CH-1032 Romanel-sur-Lausanne, Switzerland
Voice: +41 21-648 23 34 Fax: +41 21-648 24 11
E-mail: [log in to unmask]
URL: Technical and consultancy divisions:
       http://www.protonique.com
     Web services division:
       http://www.protonique.com/webserv

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