A study from Lawrence Berkeley National Laboratory analyzes the implementation of energy management systems (EMIS) in commercial buildings in the United States. The study examines the costs and benefits of EMIS, including energy savings and operational benefits. The study also highlights the different types of EMIS, such as energy information systems (EIS) and fault detection and diagnostics (FDD), and how they are used in monitoring-based commissioning (MBCx). The study finds that FDD systems provide greater savings than EIS systems, but also incur higher costs. The study also examines the role of MBCx service providers in supporting EMIS implementations and emphasizes the importance of a coordinated energy management strategy to realize the full benefits of EMIS.