产品生命周期,是指产品在市场上自出现,逐渐由弱到盛,又从盛到衰,直到从市场上淘汰的全过程。它指的是产品的市场生命,而非使用生命。典型的产品生命周期包括四个阶段:投入期、成长期、成熟期和衰退期。每一个阶段,产品的质量、功能成熟程度,消费者的需求心理、需求量,市场销售数量,市场竞争状况及市场营销策略都 Product life cycle, refers to the product self-emergence in the market, gradually from weak to Sheng, but also from prosperity to decline, until the entire process of elimination from the market. It refers to the product of the market life, not the use of life. A typical product life cycle consists of four phases: investment, growth, maturity and recession. At each stage, product quality, functional maturity, consumer psychology, demand, sales volume, market competition and marketing strategy