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Subject:	Re: Assembly Documentation Question
From:	E Mac <[log in to unmask]>
Reply To:	(Designers Council Forum)
Date:	Sat, 8 Oct 2005 20:17:47 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (78 lines)

I have gone thru this of revision control many times. I have learned that you need to stick with basics.

It appears that the assembly drawing is an item in the parts list. Hence an hierarchical structure. When an event occurs which changes a revision of a lower item, then all revisions higher in the hierarchy should also change. So if the assmebly drawing changes then the parts list revision, since higher in the hierarchy, should also change.

It is not standard to change the revision of an item in an assembly (parts list) when an event causes another item in the same hierarchy to change. So if a cap changes in the parts list, this would not cause the assembly drawing to change revision. Reasoning, the assembly drawing has not changed.

It is getting over the concept of hierarchy which is a trouble. The drawing revision does not imply anything else then it's revision. It is simply a drawing.

Eric

Michael Kuczynski <[log in to unmask]> wrote:
The company I work for is going thru some documentation change
discussions.
Below are the documents that are revisable. (The parts list contains all
the IC's, cap, res. etc. and documents.)
The feedback I'm getting is the the parts list and the assembly drawing
should ALWAYS be the same revision (becasue thats the way its always
been).
Everywhere I've every worked, these are independent documents.

Here are my scenerio case: (All documentation released at Rev. A)

Scenerio (Rev: B): A part number change, of a 1K, 5% resistor to a 1K,
1% resistor.
In this case, the part list and schematic would change, but it has no
effect on the assembly (because no part number or value is on the assembly
drawing).

PL1234567-1 Rev: B Parts List
AW1234567 Rev: A Assy Dwg
DS1234567 Rev: A Drill Dwg
PC1234567 Rev: A Artwork
PA1234567 Rev: B Schematic

Scenerio (Rev: C): The length of the screw holding the stiffener bar is
changed from 3/8 in. to 1/2 in.
The change is to the parts list only, the assembly drawing stays the same.
(no 3D view or side view)

PL1234567-1 Rev: C Parts List
AW1234567 Rev: A Assy Dwg
DS1234567 Rev: A Drill Dwg
PC1234567 Rev: A Artwork
PA1234567 Rev: B Schematic

The current discussion and question is;
-Can the parts list be independently revisible, from the assembly drawing?
-What do most of the assembly houses usually like?

Thanks for any response to this question.

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