Hi Pat!
     
     As someone said awhile back when a question similar to this appeared 
     on TechNet - x-outs should be the exception and not the norm! If I was 
     seeing a constant stream of x-outs regardless of the number of pwbs 
     per panel, I would be concern. If the pwb is a complicated fabrication 
     for the pwb vendor or the pwb vendor has communicated that because of 
     design feature xyz they expect to have some x-outs then I would look 
     at the situation differently but if the pwb is nothing out of the 
     ordinary then there is a problem. Good Luck.
     
     
     Dave Hillman
     Rockwell Collins
     [log in to unmask]


______________________________ Reply Separator _________________________________
Subject: X-outs On Multiple Board Arrays
Author:  [log in to unmask] at ccmgw1
Date:    12/13/96 9:15 PM


I was wondering what policies others have regarding accepting x-outs on 
multiple board arrays.  We currently allow 50%, with the intent being we 
would use a two up array with one x-out, but don't want to see 10 x-outs on 
a 20 up array.  We are contemplating going to something different, say 5% 
or 1, whichever is greater.  Or possibly no x-outs, but I'm concerned about 
the cost ramifications of this (cost is a function of yield, right?).  I 
would appreciate any input from both fabricators and assemblers.
     
Regards,
     
     
Pat Bailey
Zytec Corporation
     
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