How can you find out if a compact 18 inch dishwasher is large enough for a family of four?

An 18 inch dishwasher is one of the smallest dishwashers available for purchase. It is basically designed for single individuals or couples. There is information available to study the comparisons of these dishwashers. Overstock has a guide that will help with the decision of deciding if the 18 inch is beneficial for a family of 4 or not so beneficial. Apartment Therapy website also has some information regarding compact dishwashers.