Question: who did develop the abandonment stage in the plc

title: Product life-cycle theory
text: By this time in the product 's life cycle , the characteristics of the product itself and of the production process are well known ; the product is familiar to consumers and the production process to producers . This occurs when the product peaks in the maturity stage and then begins a downward slide in sales . Eventually , revenues drop to the point where it is no longer economically feasible to continue making the product . Investment is minimized . The product can simply be discontinued , or it can be sold to another company . Production may shift to the developing countries . Labor costs again play an important role , and the developed countries are busy introducing other products . For instance , the trade pattern shows that the United States and other developed countries have now started importing the product from the developing countries .