You should search the archives of the LeadFree forum, for extensive
discussion on this. OEM's are doing it both ways, just like component
manufacturers. Some are changing internal part numbers, some are not.
Some are putting in temporary part numbers while stock is in transition.
I lost the battle for new Pn's, so the last is sort of our method. If
we need both, we make a new PN, but most we are allowing to transition
without changing the number. For some, we are making a Pb part number
to reserve some stock for one product, and allowing the original PN to
transition. Then we don't need to change 100's of PartsLists and BOM's,
just the one or two that need careful handling.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Black, Paul
Sent: 21-Nov-05 12:50 PM
To: [log in to unmask]
Subject: Re: [TN] Part number controll for RoHS
Hi Tom,
You can't mix leaded and leadfree parts, so you need to have different
internal part #'s for them. Our PN scheme has a suffix, such as
xxxxx-001. For the same PN in leadfree, it would be xxxxx-101. If we
were to find that one of our old part #'s had three manufacturers on the
AVL and they all turned out be leadfree, we would still create the new
part # for them. For an assembly that will eventually become leadfree,
we have created an interim BOM, and replace the leaded parts with
leadfree ones as each part is qualified. Once the whole BOM has been
qualified, the whole board assembly will change, once again using the
xxxxx-001 to xxxxx-101 format. This way, there will be no MRP demand for
a part until we decide that we are ready to build in volume. In the
meantime, prototypes are handled buy buying or sampling small quantities
at a non-production revision, with no MRP requirements involved, and the
leadfree parts are kept in a separate room from the leaded parts.
Hope that helps.
Paul Black
Manufacturing Engineer
Kronos
E-mail: [log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Tom Glum
Sent: Monday, November 21, 2005 1:15 PM
To: [log in to unmask]
Subject: [TN] Part number controll for RoHS
How are companies and/ or individuals handling the part number control
(MRP) for leaded and leadfree parts? Specifically the same part in 2
different alloys. Thanks you in advance for your ideas.
Tom Glum
Director of Manufacturing
precision Wave Corp
7899 Lexington Dr. Suite 102
Colorado Springs, CO 80920
[log in to unmask]
719-3250515
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