High Quality Content by WIKIPEDIA articles! In economics, a production–possibility frontier (PPF), sometimes called a production–possibility curve or product transformation curve, is a graph that compares the production rates of two commodities that use the same fixed total of the factors of production. The PPF curve shows a possible specified production level of one commodity that results given the production level of the other. By doing so, it defines productive efficiency, such that production of one commodity is maximised given the production level of the other commodity. A period of time is specified as well as the production technologies. The commodity compared can either be a good or a service.