"Agile development methods are key to the future of flexible software systems. Scrum is one of the vanguards of the new way to buy and manage software development when business conditions are changing. This book distills both the theory and practice and is essential reading for anyone who needs to cope with software in a volatile world." -- Martin Fowler, industry consultant and CTO, ThoughtWorks "Most executives today are not happy with their organization's ability to deliver systems at reasonable cost and timeframes. Yet, if pressed, they will admit that they don't think their software developers are not competent. If it's not the engineers, then what is it that prevents fast development at reasonable cost? Scrum gives the answer to the question and the solution to the problem. -- Alan Buffington, industry consultant, former Present, Fidelity Systems Company.