Karl Wiegers is Principal Consultant with Process Impact, a software development consulting and training company in Happy Valley, Oregon. Previously, he spent eighteen years at Kodak, where he held positions as a photographic research scientist, software developer, software manager, and software process and quality improvement leader. Karl received a PhD in organic chemistry from the University of Illinois. Karl is the author of twelve previous books and has written many articles on software development, management, design, consulting, chemistry, and military history. Karl has served on the editorial board for IEEE Software magazine and as a contributing editor for Software Development magazine.