After the research team at Nabisco had generated more than two dozen new-product ideas for a substitute for partially hydrogenated oils that tastes the same but has zero trans fat, the company’s team has narrowed down the potential ideas to three potential product concepts. The next step for the product development team is to determine the likely costs associated with, resources required to produce, and estimate likely demand for the potential products. The next stage of the new product development process that this company should therefore engage in is called: