Philippe Kruchten is a retired professor of software engineering in the department of Electrical and Computer Engineering.  He had joined UBC in 2004 after a 30-year career in industry, where he worked mostly in with large, software-intensive systems design in the domains of telecommunication, defense, aerospace and transportation. Some of his experience is embodied in the Rational Unified Process (RUP) whose development he directed from 1996 until 2003, when Rational Software was bought by IBM. RUP includes an architectural design method, known as “RUP 4+1 views”. His current research interests still reside mostly with software architecture, and in particular architectural decisions and the decision process, and gthe elusive concept of "technical debt" . Dr. Kruchten received his mechanical engineering diploma from Ecole Centrale de Lyon, and his doctorate degree in Information Systems from Ecole Nationale Supérieure des Télécommunications, Paris. He is a member of IEEE, ACM and AIS, and a Professional Engineer in British Columbia.  Philippe Kruchten is a retired professor of software engineering in the department of Electrical and Computer Engineering.  He had joined UBC in 2004 after a 30-year career in industry, where he worked mostly in with large, software-intensive systems design in the domains of telecommunication, defense, aerospace and transportation. Some of his experience is embodied in the Rational Unified Process (RUP) whose development he directed from 1996 until 2003, when Rational Software was bought by IBM. RUP includes an architectural design method, known as “RUP 4+1 views”. His current research interests still reside mostly with software architecture, and in particular architectural decisions and the decision process, and gthe elusive concept of "technical debt" . Dr. Kruchten received his mechanical engineering diploma from Ecole Centrale de Lyon, and his doctorate degree in Information Systems from Ecole Nationale Supérieure des Télécommunications, Paris. He is a member of IEEE, ACM and AIS, and a Professional Engineer in British Columbia.