A building management system (BMS), otherwise known as a building automation system (BAS), is a computer-based control system installed in buildings that controls and monitors the building’s mechanical and electrical equipment such as ventilation, lighting, power systems, fire systems, and security systems. A BMS consists of software and hardware; the software program, usually configured in a hierarchical manner, can be proprietary, using such protocols as C-Bus, Profibus, and so on. Vendors are also producing BMSs that integrate using Internet protocols and open standards such as DeviceNet, SOAP, XML, BACnet, LonWorks and Modbus.
BMS systems are a critical component to managing energy demand. BMS deals with energy demand management. EDM integrates energy policies and regulations in to overall company operations. It incorporates energy targets into overall business strategies. EDM conduct management reviews and establishes a system to collect, analyze and report data related energy consumption and ensure correctness and integrity of that data.