The commissioning process assures the building owner that the equipment, systems, and controls providing light, heat, cooling, and ventilation are effectively working together in conformance with design intent. Commissioning determines whether the systems need to be adjusted to improve efficiency, indoor air quality, and acoustic performances. The commissioning process encompasses-but also surpasses-the normal testing, adjusting, and balancing (TAB) activities commonly performed in inspections. Commissioning also involves comprehensive functional testing to determine how well mechanical and electrical systems work together. Because so many building systems are now integrated, a deficiency in one component can result in substandard operation and performance among other components.
In general practice, a commissioning agent assists the construction team in substantively reducing and eliminating defects before the building is turned over to its occupants. Commissioning may also occur based on a partial system upgrade.