I am not GATor, but...
Job numbers were just an accounting thing. Jobs were assigned by an editor to the writer, the penciller, the letterer, and the inker, and they just needed a way to track them through the various steps -- both for accounting purposes and for job flow.
Some job numbers in fact had the editor's initials -- see SL for Stan Lee or even AG for Archie Goodwin in the later black-and-white magazines -- but don't always assume that Stan or Archie or whomever actually did anything with it other than maybe assign the story.
The job numbers are slightly interesting where you can see stories that may have been finished a couple of years earlier but never printed at the time (for whatever reason). So in an issue of Marvel Tales, you may have C-341, C-361, and C-081.
The job numbers are often listed in various indexing sites (www.comics.org, for example), but they're by no means complete.
Sorry I missed question.