Software as a technology is changing the face of the world and is the driving force behind many aspects of business, science and engineering. As computing systems become more powerful and complex the need of systematic approaches in software development has become inevitable. Software engineering provides methods and tools to deal with the complexities involved in software development and enables us to develop a high-quality, reliable, maintainable, and error free software that satisfies customers¿ requirements This book provides an in-depth coverage of fundamental principles, methods, and applications of software engineering. The text is presented in simple, concise, and easy-to understand language. Also, the subject matter is well supported by examples, tables, diagrams, and case studies to make topics clear and understandable.