Hi,

 Rework instructions go in the ECO. This is what folks approve.

Scrap?  Cost of rework and nature of changes. If reworked assemblies are not
functionally compatible with previous then a new Assembly Number is required
and previous rev might be retained as is for spares. If they remain
functionally the same (IE bug fix) then everything is always rework unless
rework is extensive.

I always use Rev x as a circuit board Rev in the etch. ASSY is for the
constructed assembly.  Actually I keep the ASSY# simple and constant and
have serial numbers on many items. This is the only way I see to monitor
other configuration info such as special part loading or firmware.

Bob K.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Nutting, Phil
Sent: Friday, May 03, 2013 1:34 PM
To: [log in to unmask]
Subject: [TN] ECO material management

Hi All,

Although this is not directly related to circuit board technology it does
apply to the management of inventory affected by Engineering Change Orders.

I'm interested in knowing how your operation manages on-hand inventory after
an ECO has been approved and is in the implementation phase.

Assume you have 25 bare boards at Rev B, the ECO is bumping the revision to
Rev C, MRP is driving a work order for 100 pieces and the difference between
B and C can be done as a rework to the Rev B boards and then "used as" Rev C
boards in the kit of 100.


What drives the rework, instructions in the ECO, Material Control personnel,
ECO coordinators?  Or is it simpler to manage by scrapping out all out of
rev inventory?

I know how it was done in a previous life (mid '70s) so I know it can be
done, just not with our current system/people here.

Thanks in advance.

If you have documentation to share please send it offline.

Phil Nutting  |  HVP Development Engineer   |  Excelitas Technologies Corp.

Direct: 978.224.4152
Main: 978.745.3200
Fax: 978.745.1451

35 Congress Street, Salem, MA  01970
[log in to unmask]<mailto:[log in to unmask]>
www.excelitas.com<http://www.excelitas.com/>


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