Dean Leffingwell is a consultant, entrepreneur, executive and technical author who provides product strategy and enterprise-level agility coaching to large software enterprises. From 2006-2007, Mr. Leffingwell was founder and CEO of consumer marketing identity company ProQuo, Inc. Mr. Leffingwell has also served as chief methodologist to Rally Software. Formerly, Mr. Leffingwell served as Vice President of Rational Software, now IBM’s Rational Division, where he was responsible for the Rational Unified Process. Leffingwell was also co-founder and CEO of Requisite, Inc., makers of RequisitePro for requirements management. Mr. Leffingwell has been a student, coach and author of contemporary software engineering and software development management practices throughout his career. His latest book, Scaling Software Agility: Best Practices for the Large Enterprises was published by Addison-Wesley in 2007. He is also the lead author of the text Managing Software Requirements, First and Second Editions, also from Addison-Wesley.