““Of course, there is one obvious thing we could do to try to improve velocity: work longer hours. Working a lot of consecutive overtime might initially cause velocity to increase (see “Overtime” in Figure 7.14). Figure 7.14. The effect of overtime on velocity (based on a figure from Cook 2008) That increase will almost certainly be followed by an aggressive decline in velocity along with a simultaneous decline in quality. Even after the overtime period ends, the team will need some amount of time to recover before returning to its reasonable baseline velocity. I have seen examples of where the trough (decreased velocity area) during the recovery period is larger than the crest (increased velocity area) during the overtime period. The end result is that lots of overtime may provide some short-term benefits, but these are frequently far outweighed by the long-term consequences.””
