[Steve] Jobs imagines his garbage regularly not being emptied in his office, and when he asks the janitor why, he gets an excuse: The locks have been changed, and the janitor doesn’t have a key. This is an acceptable excuse coming from someone who empties trash bins for a living. The janitor gets to explain why something went wrong. Senior people do not. “When you’re the janitor,” Jobs has repeatedly told incoming VPs, “reasons matter.” He continues: “Somewhere between the janitor and the CEO, reasons stop mattering.” That “Rubicon,” he has said, “is crossed when you become a VP.
--Adam Lashinsky, Fortune, on taking responsibility for results