Custom properties from a list

I'm trying to create a list of "processes" to add to my part drawings showing all the steps required to produce the part.  I set up a text file with the custom properties tab calling out "Process 1", "Process 2", etc.  and my drawing successfully calls them out.  However, what I'm looking for now is to callout the LAST process in the BOM of the weldment, so we know the last "station" that the part should have gone through.

  For example I have a weldment consisting of 2 parts: one is Laser->Bend and the other is Saw.  I would like to put a column in my BOM that reads Bend & Saw.

  Any thoughts on how to achieve this.

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