Change one assumption at a time when learning
Population, mode share, rainfall or energy demand can each affect results.
Dependencies create second-order effects
A transit change can alter road demand and curb use, not only ridership.
Scenarios are not predictions
They are structured ways to test choices against plausible futures.
Models need transparent assumptions
A sophisticated model is only as useful as the data and logic behind it.
Scope boundary. This page explains system relationships at a planning level. Real utility, transportation, emergency, structural, electrical, cybersecurity and public-safety decisions require local agencies and qualified professionals.