The Twin Peaks model draws attention to the synergistic relationship between requirements and architectural design. It emphasizes the need to progressively discover and specify requirements while concurrently exploring alternative architectural decisions. The Twin Peaks model addresses the problems found in more linear development processes in which either the requirements are specified and frozen without considering the implications on the architectural design, or the opposite case occurs in which the architecture is designed without negotiating emerged conflicts, balancing trade-offs and making desirable changes in the requirements.