My coworker said "It is not recommendable to delete a part number and replace with another existing part number. The part number shall be deleted and that’s it."
I tend to disagree because the quantity and item numbers are left blank. See attached file.
I deleted a part from the BOM because it wasn't needed. But after a few weeks, the customer wants the part back in the assembly. Can I bring the same part on the BOM or do I need to assign a new number?
That would be a revision to the assembly. If it radically changes the function of the assembly, then it would have to be a new part number. Example, you add a missing screw, that would be a revision. You add a new mechanism that adds or changes the function of the assembly, that would need to be a new assembly number.
Steve
good job on the responses.
Lets clear up some things. ASME (American Society of Mechanical Engineers), is an organisation that develops and publishes BOTH standards and codes. A Standard is a published technical specification and a Code is a Standard that is now enforceable by law as per governmental or contractual requirements when something is to be built. Regarding drawings, in the USA, there is ASME Y14.100 (and its subsets). NASA uses there own version (KSC-GP 35), Military had one of their own, but now uses ASME standards for drawings. ANSI doesn't have a standard for drawings, they sell ASME's version. So, ASME is not just about Codes. If you look at their logo it even says so; "ASME - Setting the Standard".
Regarding the above issue. One method of dealing with this is to ask this question; can the new part be interchanged with the old one? If yes, make a revision. If no, create an new part number, issue a Engineering Change Order which supersedes the old part number. See ASME Y14.24 & ASME Y14.35 It looks like you are exchanging one FOAM for another FOAM. There may be purchasing issues that could cause problems if they don't clearly understand what's happening. That's why ECN / ECO are important.