I just noticed how much reuse there is in this comic. Panels 1, 2 and 7 all have Dilbert in the same standing position, 3, 5 and 6 all in the same walking position, and the boss in panels 2, 3 and 5 (minus a change in facial expressions). I'm not familiar enough with past comics to know if any of these are similar to previous comics, but I find it conceivable that Mr. Adams may have copied all of these from earlier comics.
Maybe if he didn't spend so much of his time infuriating people with his blog or on various web forums...
possibly the funniest Dilbert cartoon ever. And the analogy of asking a squirrel to land a 747 is one that I intend to rip off shamelessly, over and over again.