The document discusses the evolution of the retail buying process from traditional to modern. Traditionally, retail buying was viewed as a subset of industrial buying behavior, which focused on making coherent decisions between products and suppliers. However, the modern retail buying process is more complicated and diverse, requiring involvement in activities across the value chain such as product development, market analysis, and brand management. Key influences that were omitted from traditional models include private brands, retail organization structure, use of information technology, and incorporating customer experience. The modern process encompasses tasks of product management beyond just buying, including pricing, promotion, and inventory management. Category management and quick response strategies are now data-driven approaches used in the retail buying process.