在经济学中，制成品是最终用于消费而非生产其它产品的材料。比如，一个销售给最终消费者的汽车就是制成品，而作为汽车零部件的而销售给汽车制造商的轮胎称为半成品。

在统计国民收入的时候，制成品的概念只包含新的产品。比如，在计算国内生产总值的时候，就不再包含二手或三手产品的转售。

生活消费品概念与制成品的基本相同，不同的是前者更加侧重于大众消费市场。比如，生产消费品就不包含投资资产，例如价值不菲的古董，虽然它们可以称为制成品。

产成品侧重强调产品生产的完成，是与原材料相对的一个概念，它们包含制成品和半成品。

In economics, any commodity which is produced and subsequently consumed by the consumer, to satisfy its current wants or needs, is a consumer good or final good. Consumer goods are goods that are ultimately consumed rather than used in the production of another good. For example, a microwave oven or a bicycle which is sold to a consumer is a final good or consumer good, whereas the components which are sold to be used in those goods are called intermediate goods. For example, textiles or transistors which can be used to make some further goods.