The life cycle of a product All products have a life cycle. Therefore, new products are being developed all the time to replace older products which are coming to the end of their lives. The cycle begins when a new product is ___________. At that stage, there is only a plan or a drawing, which is then used when the product is ___________. Nobody knows how well the new product works or how good it is so it has to be ___________ . On the basis of the test results, it may have to be modified. Once the necessary ___________ have been made, the product is ready to be launched and then ___________ in a number of advertising campaigns. Advertising plays a very important role and so does ___________ . Indeed, the company has to make sure that its new product is ___________ to as many customers as possible. Finally, when it is clear that sales are going down steadily, the company will probably decide to ___________ the product.