The document discusses concept testing, which involves presenting a detailed product concept to potential customers to gauge their reaction before developing the actual product. It provides examples of concept testing from DaimlerChrysler on fuel cell vehicles and discusses successful and unsuccessful product concepts that were concept tested, such as positive reactions to Oreo Chocolate Cones but negative reactions to a toothbrush spray and meat marinade injector. The document outlines the concept testing process and methods used to communicate concepts to respondents.