The SEI helps advance software engineering principles and practices and serves as a national resource in software engineering, computer security, and process improvement. The SEI works closely with defense and government organizations, industry, and academia to continually improve software-intensive systems. Its core purpose is to help organizations improve their software engineering capabilities and develop or acquire the right software, defect free, within budget and on time, every time.
"Testing these systems in all of the various ways that they may fail can be very difficult. So, it puts more importance on developing an architecture that satisfies good design principles in analyzing that architecture up front."