With over a quarter-century of software and systems engineering experience, Rex Black is President of Rex Black Consulting Services (www.rbcs-us.com), a leader in software, hardware, and systems testing. For over fifteen years RBCS has delivered services in consulting, outsourcing, and training for software and hardware testing. Employing the industry's most experienced and recognized consultants, RBCS conducts product testing, builds and improves testing groups, and hires testing staff for hundreds of clients worldwide. Ranging from Fortune 20 companies to start-ups, RBCS clients save time and money through improved product development, decreased tech support calls, improved corporate reputation, and more. As the leader of RBCS, Rex is the most prolific author practicing in the field of software testing today. His popular first book, Managing the Testing Process, has sold over 40,000 copies around the world, including Japanese, Chinese, and Indian releases, and is now in its third edition. His six other books on testing-Advanced Software Testing: Volumes I, II, and III, Critical Testing Processes, Foundations of Software Testing, and Pragmatic Software Testing-have also sold tens of thousands of copies, including Hebrew, Indian, Chinese, Japanese, and Russian editions. He has written over thirty articles; presented hundreds of papers, workshops, and seminars; and given about fifty keynote and other speeches at conferences and events around the world. Rex is the immediate past President of the International Software Testing Qualifications Board (ISTQB) and a Director of the American Software Testing Qualifications Board (ASTQB).