In this article, the authors present the framework of a model that integrates strategic product development decisions with the product's impact on future conditions of resources and the environment. The impact of a product on stocks of nonrenewable sources and sinks is linked in a feedback loop to the cost of manufacturing and using the product and to the end-users' preference for a sustainable product. Two product development scenarios are analyzed to illustrate the model's capabilities. These cases represent widely different market conditions and strategies in product development vis-a-vis sustainable product design and manufacturing. Future work must focus on application of the present framework to cases of realistic products and markets to further develop the model as a useful decision-making tool. The model might also serve as a means of analyzing normative resource-cost scenarios in regulatory policy mechanisms for sustainability. (Contains 3 figures.)