Chilled water plant controls are often specified to optimize the energy performance of the system. Prescriptive sequences of operation to achieve optimal performance, however, are rarely specified with a level of detail necessary for implementation by the controls contractor. Without performance criteria of an ‘optimized’ system or prescriptive sequences of operation, defining acceptance criteria for commissioning is exceptionally challenging. Various control strategies are available to lower total chiller plant energy consumption through all modes of operation. This presentation provides an overview of the most commonly implemented control sequences, including condenser water temperature reset based on outside air wet bulb temperature, chiller lift, chiller part load, and condenser water flow control. The balance of responsibility to develop control sequences, best practices and project examples will be presented along with recommendations for achieving sustained system performance.