REX BLACK is president and principal consultant of RBCS, Inc. With a quarter-century of software and systems engineering experience, Rex specializes in working with clients to ensure complete satisfaction and positive ROI. He is a prolific author, and his popular book, Managing the Testing Process, has sold over 25,000 copies around the world, including Japanese, Chinese, and Indian releases. Rex has also written three other books on testing – Critical Testing Processes, Foundations of Software Testing, and Pragmatic Software Testing – which have also sold thousands of copies, including Hebrew, Indian, Japanese and Russian editions. In addition, he has written numerous articles and papers and has presented at hundreds of conferences and workshops around the world. Rex is the immediate past president of the International Software Testing Qualifications Board and the American Software Testing Qualifications Board.