Requirements-driven product definition is a sure-fire way to get 100% of the wrong product launched. The assumptions that requirements are based on are usually not accurate enough to determine the exact solution those requirements dictate. Instead, teams should focus on creating a series of hypotheses that define potential solutions to their business problem and then work together to learn which of these hypotheses are keepers and which ideas to kill. At the Lean IT SUmmit 2014, Jeff Gothelf provided an overview of how to apply the ideas behind Lean UX and Design Thinking to project definition and planning. Video available soon on Institut Lean France youtube channel.