Barry, being that you want to conduct a DOE on reworks, I would say that one
factor you should consider would be the total number of reworks per site.
While generally accepted is a maximum of two reworks per site, you can push
the envelope to 4 reworks. Also, pay attention to the degradation of
reworked site(s) during and after solder cleaning.
As Brian pointed out, the beauty of Taguchi is that you can accommodate more
factors at more levels in your study, while maintaining a fair amount of
trials (rework can become costly in a DOE).
Just a morning reflection...

Good day.
Regards,
Liviu

-----Original Message-----
From: Brian Ellis [mailto:[log in to unmask]]
Sent: May 16, 2002 3:10 AM
To: [log in to unmask]
Subject: Re: [TN] D.O.E


Taguchi systems do not require software, they are so simple. They also
drastically reduce the number of experiments required to produce a
result but -- IMPORTANT -- you require to do a single post-experiment to
confirm the result.

Brian

Barry Gallegos wrote:
>
> Good day folks.
>
> I have never conducted a Design of Experiments, and my illustrious boss
has
> mentioned that maybe I should perform one on a BGA flux vs. paste rework
> scenario.
>
> is there a software or can some one lend some free advise on this.
>
> If necessary please feel free to contact me off line.
>
> Barry Gallegos
> Assoc. Process Engineer
> Western Electronics
> 1550 South Tech Lane
> Meridian, Idaho 83642
> Phone: 208/955-9771
> Fax: 208/955-9755
>
>
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