System Interface Complexity: The N² Problem (2D)

Every subsystem you add to a complex system does not add one integration headache — it adds up to N-1 new ones, because every existing subsystem is a potential interface partner. This 2D simulator renders a live node-link diagram (and, on request, the raw N×N interface matrix) of N subsystems and lets you compare a flat, fully-meshed architecture against a hierarchical, modular one where subsystems are grouped and each group talks to the rest of the system through a single shared bus interface. Every interface count on screen — including the growth chart tracking interfaces against N for both architectures — comes from actually building the graph and counting its edges, not from evaluating a formula. Drag the subsystem-count and module-size sliders to watch the diagram, matrix and metrics respond immediately, then run a verification pass to see every live interface get exercised, exactly as an integration test campaign would.