Progress as a Motivator
The Progress Principle - http://hbswk.hbs.edu/item/6685.html?wknews=09072011 by Amabile and Kramer
Managers failed to recognize supporting progress in everyday work is an important motivator and impacts employee emotions more than other methods of support.
"And not only did managers get the wrong answer on our survey. In the companies we studied, far too many managers acted as if they didn't understand the importance of supporting everyday progress. One of the most common ways that managers unwittingly undermine daily progress is by failing to make timely decisions or provide clear, consistent goals. "
""Besides impeding progress, shifting goals can also drain work of its meaning. When people feel that their hard work will not amount to anything, they come to feel that they are wasting their time, and that their work is without value.