This document outlines the stages of the design process for sustainable product realization. It discusses the six main stages: 1) recognizing a need, 2) defining the problem, 3) synthesizing potential solutions, 4) analyzing and optimizing solutions, 5) evaluating solutions, and 6) presenting the final design. An example of designing a fountain pen is used to illustrate how each stage would be applied. The overall goal of the design process is to solve problems and meet customer needs in a sustainable manner.