Building Management System (BMS) Integration
CSI Division 25, Integrated Automation
The work of connecting a building's separate specialty systems, fire alarm, access control, elevators, lighting control, metering, into a single [[concept-building-automation-system|building automation system]] so facilities staff can monitor them from one place, rather than switching between each manufacturer's own standalone software.
Why it matters
Each specialty system typically comes from a different manufacturer with its own proprietary protocol, and getting them to actually communicate with a central BAS, rather than simply sitting next to it, has to be scoped, budgeted, and tested as its own piece of work, not assumed to happen automatically once every system is installed.
On a real project
On a large office building, the commissioning agent requires a documented integration test confirming the BAS can actually read real-time status from the fire alarm and metering systems, not just display a static value, before signing off on the integration as complete.
Who this matters most to
A Construction Technology Manager scopes and oversees the integration work across specialty subcontractors. A Commissioning Agent verifies the integration actually functions before turnover.
Where this goes wrong
A general contractor assumes the BAS will automatically integrate with the elevator controls once both systems are installed, but the elevator manufacturer's proprietary protocol was never scoped into the BAS integration contract. The owner discovers at turnover that elevator status simply doesn't appear on the BAS dashboard at all.