A method for detecting the energy and water consumption of dishwashers, whereby an energy/water consumption rating can be optimized for dishwashers. The amount of energy and water required to operate dishwashers containing at least two separate washing systems, each having a separate closable washing container, is detected separately for each washing system, and the energy/water consumption is rated on the basis of the amount of energy and water detected for each washing system. A dishwasher preferably is provided with at least two separate washing systems, each having a separate closable washing container, in which the energy and water consumption is detected and rated according to the method in order to optimize the energy/water consumption rating.