The primary purpose of market research in the Concept Evaluation Stage is to gather data to assess the viability and potential of a product concept. This includes understanding customer needs, market size, and competitive landscape, rather than selecting projects for funding. Techniques used include secondary research, surveys, focus groups, and concept testing. Market testing is typically done later, in the product development or commercialization phases. References: Ulrich, K. T., & Eppinger, S. D. (2015). Product Design and Development. McGraw-Hill Education.