Method of determining the energy and water consumption of dishwashers, and dishwashers

A dishwasher, comprising:

• a first dishwashing system with a dedicated closeable dishwashing compartment;
• a second dishwashing system with a dedicated closeable dishwashing compartment, the first dishwashing system being loadable with articles to be washed that are relatively lightly soiled, and the second dishwashing system being disposed beneath, or adjacent, to the first dishwashing system and being loadable with articles to be washed that are relatively more heavily soiled than the articles to be washed loaded into the first dishwashing system;
• and
• a control system for (a) separately determining a respective individual quantity of energy and water necessary for operating each of said first and second dishwashing systems, (b) summing the respective individual energy-consumption and water-consumption values of the first and second dishwashing systems to form a sum which forms a basis for establishing the energy-consumption/water-consumption rating, and (c) establishing an energy-consumption/water-consumption rating of the dishwasher from the summed individual energy-consumption and water-consumption values of the first and second dishwashing systems.