Mike Cohn is the founder of Mountain Goat Software (http://www.mountaingoatsoftware.com), where he teaches and coaches on Scrum and agile development. He is the author of Agile Estimating and Planning, User Stories Applied for Agile Software Development, and Succeeding with Agile: Software Development with Scrum. With more than 25 years of experience, Mike has previously been a technology executive in companies of various sizes, from startup to Fortune 40. A frequent magazine contributor and conference speaker, Mike is a founding member of the Scrum Alliance and the Agile Alliance. He can be reached at http://www.mountaingoatsoftware.com