Building automation systems allow people to monitor power usage, hardware malfunctions, and even control when and how lights, air conditioners, and security systems operate over the course of a typical business day. Since 2000, a majority of commercial, institutional, and industrial buildings have been built with at least some kind of basic automation system installed. Within the past decade, use of Internet of Things / machine-to-machine technology in building automation systems has resulted in more affordable, flexible, and customizable automation for large buildings than ever before.