I defended my PhD thesis on June 30, 2003. I then moved to Redmond, Washington, to take up a position as researcher in the Programmer Productivity Research Center at Microsoft Research. Pramod G. Joisha Center for Parallel and Distributed Computing, Electrical and Computer Engineering Department, Northwestern University, Evanston, IL 60208-3118. Phone: (847) 467 4610, Fax: (847) 491 4455 pjoisha@ece.northwestern.edu