The document outlines the major stages of new product development and the product life cycle. It discusses the new product development process, including idea generation, concept development and testing, marketing strategy development, business analysis, product development, test marketing, and commercialization. It then explains the four stages of the typical product life cycle: introduction, growth, maturity, and decline. During each stage, sales, costs, profits, and marketing strategies such as price, distribution, and advertising typically change.