Abstract: A computer-implemented method for evaluating eco-functional properties of a product, comprising: providing four inputs including raw materials, process of manufacture, functional properties and ecological properties of the product; providing five outputs including Quality, Functionality, Human Impact, 3R's (Reduce, Recycle, Reuse), and Environmental Impact; connecting the inputs and outputs using predetermined rules to generate an eco-functional model; and wherein the eco-functional properties of the product are evaluated using the eco-functional model to derive an Eco-Functional Index which is computed by the equation: ?ESI+HTI+EII+FI+Eco-I, where ESI is an Ecological Sustainability Index, EII is an Environmental Impact Index, HTI is a Human Toxicity Index, FI is a Functionality Index and Eco-I is an Ecological Index.