Scenario Trees for Infrastructure Sequencing

Infrastructure debates often collapse into catalogues of needs. Scenario trees force ordering: which investments unlock others, which depend on tariff reforms first, and which require cross-municipal coordination that takes years to negotiate.

Start branches with binding constraints—finance, skills, or land—rather than with ribbon-cutting dreams. Each node should name an owner institution and a measurable readiness indicator. If a node lacks both, it is a wish, not a plan.

We encourage learners to keep probability labels qualitative—high, medium, low—and to document disagreement inside teams. Numeric probabilities seduce readers into false precision when data is thin.

The closing section should name what success looks like for residents, not only for balance sheets. Ridership, water quality, hours saved—pick metrics that resist political cherry-picking yet remain measurable with modest survey budgets.