A building's systems are usually bought separately, commissioned separately and monitored separately — so energy is wasted in gaps nobody owns, and faults are discovered when something stops working.
The Building Management System puts them on one dashboard.
What it changes
Routine operations automate against schedule and occupancy rather than running flat out. Energy consumption becomes visible per system and per zone, which is where the savings are found. Faults are flagged from drift in the telemetry before they become failures, which moves maintenance from reactive to planned.
Works for a single campus or a portfolio of properties, with the same console.