standard for obsolescence of a part on a charted drawing

[rmetzger]

we have numerous charted drawings and on occasion a part on the drawing will go obsolete (no usage). The current system has us either removing the part from the drawing or marking a line through it in the chart.

I've not been able to locate a reference to a specific practice within the ASME standard - any suggestions?

 

[ctopher]

What type of chart is it? I'm not familiar with this type of chart on a drawing. Do you mean a BOM?

Chris, CSWA
SolidWorks 13
ctopher's home
SolidWorks Legion

 

[rmetzger]

sorry - I made that as clear as mud.

We have charted part drawings that will have a table of part numbers and their attributes (pn, description, material, supplier, supplier pn....). typically these are used for nuts, bolts, screws, washers, or other commodity items.

 

[MikeHalloran]

I'm guessing he's talking about a tabular drawing, that is used to make N different parts, which differ from each other in at least one dimension but are otherwise similar.

I fail to see the logic of putting logistical information, like whether a particular part is currently being produced and used, on the field of a drawing. That information belongs in a computer database somewhere.

I especially fail to see the logic of removing a part from the drawing when it becomes obsolete, thereby destroying information that will be very expensive to replace when you get an order for the obsolete model, or need a new part for a new model that happens to be a duplicate of the obsolete model.



Mike Halloran
Pembroke Pines, FL, USA

 

[ctopher]

I agree with Mike.
If it's a change on your chart to remove a part, draw a line thru it.

Chris, CSWA
SolidWorks 13
ctopher's home
SolidWorks Legion

 

[drawoh]

I'm guessing he's talking about a tabular drawing, that is used to make N different parts, which differ from each other in at least one dimension but are otherwise similar.

If it is a tabulated drawing, why should anybody care? The decision of what to order comes off the BOMs. If I am fabricating stuff off of a tabulated drawing, inevitably, I will not be fabricating all of the pieces shown. This could be because the part is not required, or because there is an adequate supply of pieces in the warehouse.

--
JHG

 

[dgallup]

There are times when one line in the chart may become obsolete, perhaps replaced by another line in the chart. We draw a line through the obsolete item and put a solid filled square symbol in front of the line. The solid filled square symbol is an obsolescent symbol left over from the foreign company that owned us 5 owners ago. How's that for old habits die hard? I'm not aware of any standard for such a symbol. The purpose for marking the item obsolete is to prevent someone from trying to reuse the item in some other product.

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[jassco]

Hi, rmetzger:

If an item is obsolete, then you need to remove it. How soon does the item need to be removed? Each company has a different criteria. At my previous company, an item will be removed if it is inactive for three years.

But it is true that you do need to remove an obsolete item. Otherwise, this item will stay there forever. That is not what you would like to see. Whether you remove it or strike through it, it is up to you. With a CAD drawing, it is as easy to remove an item as it is to strike through it.

Personally, I prefer not using tabulated drawings.

Best regards,

Alex

 

[MintJulep]

will go obsolete (no usage).

Not using something for a while is different from its being obsolete.

 

[jassco]

Hi, MintJulep:

Agree! But one has to define what is definition of "obsolescence"?

Best regards,

Alex