Lean Startup uses customer feedback as a vital component for guiding the growth of startup businesses. Lean Startup teams run continuous cycles of customer interaction to test what they know and inform decision making processes. A central element of this approach is the hypothesis. A team of entrepreneurs, UX designers, and agile developers armed with a clear hypothesis, and a healthy portion of trust, has a unique opportunity for true cross-functional collaboration. Josh will talk about how teams can replace requirements with hypotheses, how this can be done in different business contexts, and how you can make an ongoing discipline of this practice.