About the Technical Reviewers George Koelsch is a retired system engineer who resides in West Virginia, after 33 years in the DC metro area. He started system engineering 42 years ago while in the US Army, and had continued that work for an additional 33 years as a contractor for the Federal Government. With a five-year stint as an Industrial Engineer at Michelin Tire Corporation, he learned to become an efficiency expert, which he then applied to system engineering and project management to tailor the lifecycle development process before his contemporaries in the DC area were doing it. In his spare time, he authored ten nonfiction articles on computers, coin collecting, stamp collecting, and high-energy physics. Apress published his book titled Requirements Writing for System Engineering in October 2016. He now focusses on writing, all his hobbies, and other projects he has time to work on now. Venkata Kakarlapudi is a Senior Technology Architect at Infosys Limited, with over 15 years of industry experience. His areas of expertise include Java, enterprise portals, and Web content management systems. He has experience of implementing multiple large-scale enterprise applications for Fortune 500 companies across geographies. He previously headed a center of excellence for enterprise portals at the digital experience practice in his organization and is part of the core architecture team. He holds an engineering degree in Mechanical Engineering and has completed an executive management program for IT executives from the Indian Institute of Management, Bangalore. xix