Market research is an essential part of any marketing campaign. A popular research method to use is the Product Life Cycle. It consists of 4 stages- introduction, growth, maturity, and decline.

There is, furthermore, a persistent feeling that the life cycle concept adds luster and believability to the insistent claim in certain circles that marketing is close to being some sort of science.

It is withdrawn when it becomes unprofitable. The level of sales determines where a product is in its life cycle. This can be illustrated visually on a graph: The life cycle, and how long it takes ...