If the discussion about extremes leads to a dead end, then there is no shared understanding among the stakeholders about the potential value. This often means that things are too uncertain. In such cases, the next step should really be about reducing that uncertainty. Instead of deciding on the entire budget, plan incrementally. First decide on a budget for learning: this can lead to prototypes, low-fi interface testing with users, half-manual processes and skeleton applications, or even business people going back to the drawing bo