Parts List - Using "Delete" + Config Mgmt.
Parts List - Using "Delete" + Config Mgmt.
(OP)
We have several issues we are attempting to resolve related to the use of "delete" in a parts list for a drawing that has field repairable units. Global DRM states non-interchangeability dictates a new P/N. When is it acceptable to use the word "delete" in the description field of a parts list versus rolling the P/N? We've been looking for good CM reference material covering this and have come up with none. Interchangeability is discussed here and there but attempting to define when interchangeability is "re-established" is futile. What is everyone using as CM guides from a practical laymans' standpoint? Also, the use of "nX" next to balloons in an assembly versus "plcs" and "reqd" is popular and we are looking for something to back this up. Any help?





RE: Parts List - Using "Delete" + Config Mgmt.
I believe nX would be the preferred way to the newer ASME standards.
That said unless it’s needed for clarity I prefer to just rely on the quantity in the parts list.
RE: Parts List - Using "Delete" + Config Mgmt.
In assemblies that have a single-level BOM, you can replace changed components all day long, but you have to rev the top level part number to inform the world the assembly has changed. If an assembly has a multi-level BOM, you may be able to replace certain sub-assemblies with new part numbers, and not have to change or rev the top level part number. This is because the system as a whole has not changed.
As for the use of nX for quantity, that is the current standrad over other methods to describe quantities. My company does not use the nX designator on assembly drawings, but rather uses a parts list on the drawing that defines teh quatity to use. Usually nX is only used on single part drawings to define instances of radii, same sized holes, etc.
"Art without engineering is dreaming; Engineering without art is calculating."
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RE: Parts List - Using "Delete" + Config Mgmt.
The use of "delete" in BOMS, I have not seen before.
But, "delete" is used in notes. When a note is removed, it is replaced by "delete". It's in a standard, I need to find it and remember which one.
Chris
SolidWorks 06 5.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 10-27-06)
RE: Parts List - Using "Delete" + Config Mgmt.
However if you have a BOM on the drawing that specifies the qty of parts you should not put nX by the part bubble, as this is double dimensioning, unless it is necessary for clairity.
ASME Y14.100 section "4.26.6(d) General notes and flagnotes shall be numbered consecutively as a single listing starting with Note 1. Filling in voids (open spaces) to accommodate deletions is not required. Note numbers of deleted notes shall not be reused."
David
RE: Parts List - Using "Delete" + Config Mgmt.
Chris
SolidWorks 06 5.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 10-27-06)
RE: Parts List - Using "Delete" + Config Mgmt.
I prefer it when the manufacturer has created a new item number (or Item 1A vs. Item 1) for a new equivalent P/N whether it follows "Form Fit Function". Change the number in the circle/leader and then in the revision notes state Item 5 has replaced Item 1.
That way I know;
A) My old part is still valid and;
B) I know what the difference is (e.g. Buna vs. Teflon, etc.)
C) I know what to order when I run out of it. (Maybe I still want Buna)
Frank "Grimey" Grimes
You can only trust statistics 90% of the time.
RE: Parts List - Using "Delete" + Config Mgmt.
That same philosophy goes to find (item) numbers in parts lists. When you delete a part from the BOM, you should not reuse that find number. Instead, use "DELETED" as a placeholder. This is only indirectly related to CM, because CM defines when you can delete a part from an assembly and replace it with another one.
--Scott
http://wertel.eng.pro
RE: Parts List - Using "Delete" + Config Mgmt.
David
RE: Parts List - Using "Delete" + Config Mgmt.
RE: Parts List - Using "Delete" + Config Mgmt.
"Art without engineering is dreaming; Engineering without art is calculating."
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?