Bob:
               The process of putting two or more parts on one process
          panel is often referred to as "nesting".  This is generally
          frowned upon, and can lead to more "nightmares" than those
          you alluded to (i.e., part number name, etc.).  Here are a
          few that come to mind:
          *    You will be hit with multiple tooling charges if some
               parts are ordered in higher quantities than others.
               The fabricator will have to tool up various panels with
               all parts on one panel, one part on others, etc.
          *    You will be paying for dummy layers if the layer counts
               don't match up on all nested parts; the board house
               will have to fabricate the panel to the highest layer
               count.  The same holds true for copper weights.
          *    If there is a yield problem on one of the nested parts,
               all parts will have to be remade.  This may add to
               cost, and somewhere along the line, price.
               If you decide to go the "nested" route, I would suggest
          that the nested parts be given one part number name.  Most
          fab shops will need to track the product as one part number.
          Keep in mind all of the issues outlined above.  I would
          recommend getting the parts quoted as both "nested" (you
          will need to supply a proposed array drawing) and
          individually.  In this way you can make an enlightened
          decision as to whether nesting is worth it or not.  Good
          luck!
          Regards,
          Tom Coyle
          Field Services Engineer
          HADCO Corporation

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