Simply a question of yield and expense.  If the board fab can make panels with zero errors, and you are willing to pay for them, then go with no X-outs.  Keep in mind that if you are going to use waste as a parameter in this tradeoff that the board fab will be tossing out whole panels rather than have you waste solder on a couple of ups.

Wayne Thayer

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Amol Kane
Sent: Monday, June 06, 2011 11:22 AM
To: [log in to unmask]
Subject: [TN] X-Out Policy

These is a debate currently raging on internally on whether or not to allow X-outs on panelized assemblies. I am of the opinion to not allow any X-outs as this entails manual intervention on the line to not populate that particular board (we have not programmed any bad board sense into our programs), and to a lesser extent, leads to solderpaste wastage. Furthermore, to me, accepting X-outs means accepting a more variable (if not a out of control) process at the board house. However, I want to to hear to any opinions otherwise if any

What is the industry doing as a whole regarding X-outs?

Thanks,
Amol



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