This document discusses the process of product development. It begins by defining product development as creating, innovating, or developing a new product or improving an existing product. It then discusses product research, which informs the development process. The document outlines tools used in development like simplification, standardization, and specialization to enhance efficiency. It identifies the key stages of product development as idea generation, screening, concept development, business/market analysis, introduction, and product life cycle analysis. It concludes by discussing product line extensions, where new products are created within an existing brand.