Dennis,

We change the board part number (or dash number) only when the new change is not
backward compatible. The parent assembly BOM will of course need to reflect the
new board #. You don't have to do that if your MRP/ERP system treats different
rev as different part numbers.

Even if a change doesn't affect the artwork, it's hard to agree internally
whether it has impact on form, fit, function. An example is to change the PCB
laminate material.

Regards
K.K. Chin
Artesyn Technologies
Fremont, CA
http:\\www.artesyn.com




Dennis Ward <[log in to unmask]> on 04/07/99 10:47:36 AM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to
      Dennis Ward <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: KK Chin)
Subject:  [TN] Part number systems




Hello,

I was wondering if someone could help me with some finer points
of documentation?

Right now we have a system where we try to distinguish between
form, fit, function changes versus a "documnetation change".

Example: board number XX-XXXXX-01 rev:A. The board number
is the same number as the fabrication drawing number.

Above board is fabricated, but when it comes back in house
we notice that we need to add more functionality. Thus new
artwork is needed so the board number goes from
XX-XXXXX-01 Rev:A to XX-XXXXX-02 Rev:A

Now the new board is at the board fabricators and they
notice an error on the fabrication drawing. Since this
correction will not change the artwork, only the drawing
 the new number is changed to XX-XXXXX-02 Rev:B in-
dicating a NON-form, fit or function change.


Sooooo........
1) Does this make sense?
2) How do you people handle part numbers and rev changes??
Do any of you try to distinguish between form, fit, function
versus non-form, fit, function.
3) When your raw board changes does this have a "domino"
effect and change every BOM up the ladder?

Hope this scenario makes sense, sorry if it doesn't.

Regards
Dennis

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text
in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for
additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700
ext.312
################################################################

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################