The (PITO, DIDO) phase plot: where the city sits, where it is moving.
This plot squeezes the twenty parts of city life onto two axes. PITO runs left to right: Products In, Trash Out — buy what you need from far away, throw it away nearby. DIDO runs bottom to top: Data In, Data Out — sense what is happening, share designs and know-how, make more locally. Four cities are plotted. Paris and Hamburg appear as reconstructed points from Utopies (2018) and Boeing (2024). The arrows show which way each city is heading: less waste, more made locally, toward the top-left corner.
The diagonal and the dynamic question
The single-number index — Boeing's 37/100, Utopies' 37.58/100 — corresponds to the city's distance from the lower-right corner measured along the diagonal. Once you accept that the diagonal terminus is set by global supply-chain geometry, the meaningful question is no longer the absolute score but the trajectory: where is the city moving in (PITO, DIDO) space, and how quickly does observation become action? The third axis ρ (rho) — how fast a city turns what it learns into action — governs that velocity, and is what makes FCI 3.0 a metabolism rather than a snapshot.