"…the dominant paradigm for managing product development is wrong. Not just a little wrong, but wrong to its very core." So begins Reinertsen in his meticulous examination of today's product development practices. He carefully explains why invisible and unmanaged queues are the underlying root cause of poor product development performance. He shows why these queues form and how they undermine the speed, quality, and efficiency in product development. Then, he provides a roadmap for changing this. The book provides a well-organized set of 175 underlying principles in eight major areas. He shows you practical methods to: Improve economic decisions Manage queues Reduce batch size Apply WIP constraints Accelerate feedback Manage flows in the presence of variability Decentralize control The Principles of Product Development Flow will forever change the way you think about product development.