When you're shopping for dishwashers, you can't miss the prominent Energy Star label on the front of every appliance in the store. You notice them and you probably take the Energy Rating of the dishwasher into account before you make your decision to buy. If you're like most of us, though, you don't really know how much testing goes into dishwashers and other home appliances before they are given their Energy Star Energy Rating. There's a lot more to it than just plugging them in, running them and measuring how much electricity they consume.