Building management systems (BMS) are computerized systems that automate the daily tasks of a building. Building owners and managers use BMS to monitor and control the building’s mechanical, electrical and security systems. This can include HVAC (heating, ventilation, air conditioning), lighting and elevator controls among other things. The BMS is made up of controllers, sensors and software working together to monitor and control these various systems. Controllers receive data from sensors located throughout your facility; then they store it in memory for later use in calculations or reports.