What is the standard for deleting items in the parts list?
What is the standard for deleting items in the parts list?
(OP)
Here's the question, if I delete an item in a BOM that is no longer needed, can I re-use this number for a different part even if this new part is not a replacement for the deleted part? I think this creates confusion but a coleague disagrees. I have always heard that this is poor practice, but I can't find anything in ASME Y14.35 that supports this. Am I just missing it, or is it mentioned somewhere else? How do others handle this?
Thanks in advance for your time and your help.
Thanks in advance for your time and your help.





RE: What is the standard for deleting items in the parts list?
If it's no longer used, replace with "Removed" or "Deleted". If the old P/N is obsolete and replaced by a new p/n, use the new p/n.
Chris
SolidWorks/PDMWorks 08 3.1
AutoCAD 06/08
ctopher's home (updated Apr 30, 2008)
RE: What is the standard for deleting items in the parts list?
For a clear concise solution, consult the company DRM. If none exists, I would either draw lines through the item or, as Chris posts, remove it and put DELETED in its place. Less chance for mis-interpretation or creating problems with other documentation that may refer to the item numbers that way.
Believe it if you need it or leave it if you dare. - Robert Hunter
RE: What is the standard for deleting items in the parts list?
That said, this isn't an option for many of us in the PLM universe.
Matt Lorono
CAD Engineer/ECN Analyst
Silicon Valley, CA
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group
RE: What is the standard for deleting items in the parts list?
What CAD package are you using?
When I started to play with SolidWorks, I satisfied myself that crossing out BOM items was risky. If you transferred data to some software that does not understand Microsoft Office character formatting, the cross-outs are no longer present. At the time I played with it, SolidWorks' system for maintaining item numbers was not reliable.
I do not refer to item numbers in SolidWorks drawing notes. SolidWorks can automatically renumber the parts list. If the drawing view does not work for me, or it ceases to work due to some revision I have done, I delete it and make a new one. This takes minutes, and it destroys the old parts list.
I do not know about the other CAD packages, but some of the problems above are independant of CAD. I would focus on producing clear assembly drawings, and treat each version of the parts list as an independant document.
JHG
RE: What is the standard for deleting items in the parts list?
We are using AutoCAD 2D currently. My question was more general drafting in nature. We are considering the leap to 3D modeling and are considering either Solidworks, or UGS NX. Are there any other concerns about this subject within a given CAD program? Is there a CAD package that handles the parts list any better than another?
RE: What is the standard for deleting items in the parts list?
Believe it if you need it or leave it if you dare. - Robert Hunter
RE: What is the standard for deleting items in the parts list?
RE: What is the standard for deleting items in the parts list?
RE: What is the standard for deleting items in the parts list?
'Dumb' parts list, where you're basically just typing in the info support this well. So with Autocad this is probably a good way to do it. In fact my last place did this with Solid Edge rather than use the parametric list, this was one of it's advantages over Pro E in our context as it facilitated this more easily.
'Smart' or parametric parts lists as you get with Pro E, Solid Edge & apparently Solid Works don't seem to handle this as well. They tend to renumber items/balloons based on various settings, preferences etc.
Y14.100 D-8 has some info on 'find numbers' but doesn't really specify on whether they can be re-used at next rev.
ewh - I don't see parts lists explicitly dealt with in 14.5m-1997, were you just referring to 4.1 Revision Methods or am I missing something again?
KENAT, probably the least qualified checker you'll ever meet...
RE: What is the standard for deleting items in the parts list?
draftsmandon - if the expense is not an issue, I would recommend NX, as it is a hydrid modeler and gives the freedom of having several methods of modeling, sketches included. Sketch based packages are much more restrictive in that regard.
As for the parts lists, NX can be set up to line through deleted items. I have not seen it work, but the settings are there.
Believe it if you need it or leave it if you dare. - Robert Hunter
RE: What is the standard for deleting items in the parts list?
4.1 generally talks about deleting or crossing through information but doesn't explicitly mention parts lists that I can see.
KENAT, probably the least qualified checker you'll ever meet...
RE: What is the standard for deleting items in the parts list?
SolidWorks, and I am sure all the other 3D CAD programs, handle parts lists "intelligently". This is very good and productive most of the time. Do not rush into 3D CAD. 3D CAD is not idiot resistant, and most of it can be made to not work. Definitely, talk to your production and ERP people and work out a type once, use everywhere strategy. You will be happy and efficient.
There is no way the CAD "intelligence" is going to conform exactly to your design and documentation process. If you are not flexible, it will not work.
JHG
RE: What is the standard for deleting items in the parts list?
Right you are... it is not explicitly stated, but implicitly, which can lead to disagreement over interpretation. That is one reason why I agree with lining the item out or replacing the item with "DELETED". A more important reason for not reusing the item number is downstream documentation, as has already been noted.
Believe it if you need it or leave it if you dare. - Robert Hunter
RE: What is the standard for deleting items in the parts list?
The place that the auto renumbering on our CAD gets us is things like non associative notes or if we fudge some cabling by putting balloons on the schematic or something.
KENAT, probably the least qualified checker you'll ever meet...
RE: What is the standard for deleting items in the parts list?
Believe it if you need it or leave it if you dare. - Robert Hunter
RE: What is the standard for deleting items in the parts list?
KENAT, probably the least qualified checker you'll ever meet...