Richard H. Thayer, PhD, is a Professor of Computer Science at California State University, Sacramento, California, United States of America. He travels widely where he consults and lectures on software requirements analysis, software engineering, project management, software engineering standards, and software quality assurance. He is a Visiting Researcher at the University of Strathclyde, Glasgow, Scotland. As an expert in software project management and requirements engineering, he is a consultant to many companies and government agencies.