<snip>
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.
<snip>
This would not be always be advantageous. In your scenario, if the
board changes rev, then the parts list changes. If a subcomponent has a
rev and it changes, then the parts list changes. Why would an assy dwg
change force a parts list change? Why don't you just include the BOM on
the assembly dwg?
And when the parts list changes, then the next assembly rev changes too?
Or maybe I am misunderstanding your point...?
Regards,
Roger
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of E
Mac
Sent: Saturday, October 08, 2005 11:18 PM
To: [log in to unmask]
Subject: Re: [DC] Assembly Documentation Question
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.
[log in to unmask]
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