The bottom-up approach is a method of problem-solving or decision-making that starts with specific details or individual components and builds up to a larger system or conclusion. This approach emphasizes gathering data and insights from the ground level, allowing for a more comprehensive understanding of the overall situation. It is often used in fields like economics, management, and software development. In contrast to the top-down approach, which relies on overarching strategies or directives, the bottom-up approach encourages participation and input from all levels of an organization or community. This can lead to more innovative solutions and a greater sense of ownership among participants, as their contributions directly influence the final outcome.