Edit to add: 
Got a whole 'nother set of design for assembly Mfg Eng guidelines and assembly quality workmanship guidelines to fill gaps (we perceive) in IPC workmanship guidelines.  

Back in the basestation days... We had an internal circuit assembly rework and repair document I published that harmonized our allowed repair/rework methods, IPC workmanship and customer (Nortel at the time) rework&repair standards. An interesting Venn diagram problem, that was.  

-----Original Message-----
From: Mattix, Dwight 
Sent: Wednesday, October 21, 2015 7:40 AM
To: [log in to unmask]; 'Peter G. Houwen' <[log in to unmask]>
Subject: RE: [TN] IPC-A-610

"I couldn't solder it right, it's precluded by your design".  


Fwiw, It's a pwb fab note. Not an assembly level note.  So, your concern is valid but mute. :)

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Peter G. Houwen
Sent: Wednesday, October 21, 2015 7:00 AM
To: [log in to unmask]
Subject: Re: [TN] IPC-A-610

'A note "Shall meet IPC Class x ,blah blah, except where precluded by original design" doesn't sound like the correct approach to me - it could unintentionally result in the designer not getting vital feedback from the fabricator and assembler.'

James makes a good point.  It also makes it easy for the assembler to say "I couldn't solder it right, it's precluded by your design".  Much better to add "Except as noted", then make sure it's noted.  Makes for better design discipline and is more likely to get a response from manufacturing if you accidentally missed something.

Pete

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