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February 2011

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Subject:
From:
"Stadem, Richard D." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Stadem, Richard D.
Date:
Fri, 25 Feb 2011 11:10:46 -0600
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John,
We currently build to J-STD-001DS, Space Addendum
J-STD-001E is released, but is not intended for Space use.
J-STD-001ES does not exist.
Am I wrong?

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Perry
Sent: Friday, February 25, 2011 11:03 AM
To: [log in to unmask]
Subject: Re: [TN] : [TN] Performance Class 3A

Hello Chris and Bill,

Chris did a good job of summing up the purpose of the Class 3/A requirement, 
as it currently exists in IPC-6012C from April 2010.  

The intent was to list commonly used performance attributes within internal 
military/aerospace OEM specifications, such that Class 3/A could be specified 
in OEM procurement documentation, instead of those OEMS calling out IPC-
6012 and then their own separate set of requirements for military and 
aerospace.

Here's a future FYI - As another "Class", Class 3/A will be retired in favor on a 
set of Addendum standards to the IPC-6012.  For example, the IPC-J-STD-001 
soldering specfication does not make use of a Class 3/A.  Instead, there is a 
separate Space Addendum standard which reflects specific requirements for 
the space industry that deviate from Class 3 requirements in IPC-J-STD-001.  
If someone wants to specify those requirements for space applications, they 
have to specify the IPC-J-STD-001ES Space Addendum.  Those requirements 
are not found in the base IPC-J-STD-001E.

We are going to use that same approach and migrate away from IPC-6012 
Class 3/A to an IPC 6012 Military or Aerospace Addendum.  

As we have found in the industry, when you create another Class, many 
people think that they have to have product built to that Class, or else the 
product is junk.  For example, many people require Class 3 performance 
requirements when, for their end product application, Class 2 will work just 
fine - there are those who think Class 2 product is "bad".  We are starting to 
see the same problem with Class 3/A, and we are going to circumvent that 
problem by doing away with it and going the route of separate standard 
addendums as has been done with IPC-J-STD-001.

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