If your managers are judging your productivity by the velocity of your development, and velocity is calculated as the number of story points completed over time, then what is the best way to improve your productivity without actually doing any more work? Simply make every stroke of the keyboard a completed story.
In his article entitled Stop Using Story Points, Joshua Kerievsky talks about the problems you can get into when judging the productivity of a team by dividing story points by time.
"One day in 2004 a team was asked to go faster. This team had an average velocity around 52 points per iteration. Their velocity would fluctuate by a few points, but generally remained steady. Yet just weeks being asked to go faster, the team's velocity jumped up into the high 80s.
"I asked someone what happened. I was told 'these days around here if you sneeze, you get a story point.'"
Read the full article: Stop Using Story Points