My primary research area is software engineering. My broad research interest is on programmer productivity. I develop practical techniques and tools to help programmers create cheaper, faster, and more reliable software systems.I realize my research ideas in incremental prototypes, conduct feasibility studies to evaluate the underlying assumptions and the basic hypotheses, and use the results of these studies to iteratively improve the ideas. I also enjoy in-depth analysis of the empirical results. I strongly believe that unexpected results often present opportunities for further and better research.