This book is written for those interested in becoming systems engineers, novice systems engineers, and experienced systems engineers that desire to refine their practice. It is also of value to IT systems and applications architects.This book is not a textbook. Rather, it is a concise, easy to read, and holistic overview of systems, systems engineering, and architecting. Its content is conditioned by the author’s direct experience as well as observations made when overseeing countless projects from a systems engineering chief process engineer’s perspective.This book is not theoretical. It focuses on the essential and the practical. It relates the key activities, methods, and techniques and explains their purpose. The book details novel, effective, and easy to apply techniques for requirements discovery and misuse cases. The book also relates agile methods to systems engineering.This book provides practical guidance in areas known to cause practitioners difficulty, including requirements specification, functional analysis, design, trade studies, technical risk management, and people-oriented activities.