Top-down and bottom-up design
![Building blocks are an example of bottom-up design because the parts are first created and then assembled without regard to how the parts will work in the assembly.](/Images/godic/202502/16/Lego_Chicago_City_View_20012502.jpg")
Top-down and bottom-up are both strategies of information processing and knowledge ordering, used in a variety of fields including software, humanistic and scientific theories (see systemics), and management and organization. In practice, they can be seen as a style of thinking, teaching, or leadership.