This Standard of recommended practices for selection and verification of end-to-end accuracy in EMCS relates to the control@ energy management and management information functions of the heating@ ventilating and air-conditioning processes in buildings in the following ways:a. Describes normal types of measurements made in typical building HVAC systems;b. Defines boundary conditions at which the end-to-end EMCS accuracy shall be selected and verified;c. Outlines recommended methods of calculating systems end-to-end accuracy from given component ratings and accuracies for a variety of EMCS types;d. Provides general methods for both laboratory and field verification of system end-to-end accuracy;e. Describes how the measured information is normally used for the purposes of controlling the HVAC processes and reporting through the EMCS to the building operators and managers ; andf. Provides recommended end-to-end accuracies as a function of the controlled and monitored HVAC processes and describes use of the information.Excluded from the scope of this Standard are the considerations of sensor locations that determine the difference between HVAC end-to-end accuracy and EMC system end-to-end accuracy.