IPC 610 is a standard, but some companies may have variences from that
standard, that is their choice.  Nothing in the 610 states that a mfgr
must abideth by said standard or shall suffereth the dire penalties if
they leave the straight and narrow path.  There may be some mfg'g
concerns that are not directly addressed by 610 that need to be clearly
stated in an assembly document or standard, such as the addition of
certain special hardware or adhesives (7.3.2 good section, but isn't
clear enough for our end products).

But an order of precedence should be clearly stated and signed off by
all concerned parties.  Somebody has to make the call.

My personal preference, FWIW, is:
1) <company name> Manufacturing Standards
2) CM Manufacturing Standards
3) IPC standards
4) Component manufacturer guideline(s)
5) Other applicable industry standards

May also want to refer to A-610, section 1.4.2, "Acceptance Criteria."
Please note A-610 is number 3 in a list of 4 items. 

BRgds,
Roger

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Arciolla
Sent: Thursday, August 23, 2007 10:08 AM
To: [log in to unmask]
Subject: [TN] Fw: question regarding IPC standard

Hi all,
A question came up here yesterday regarding what has precedence in
regard to quality issues. Some say IPC 610 would over company criteria
and some visa versa. The question came up noting that it is a standard
and cannot be changed. Others said it is that companies can vary from
the standard if they choose. Help.. who is right here??

Thanks, Bob

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