The report discusses a framework for designing aircraft structures using process information. The methodology focuses on optimizing design for performance, manufacturability, and cost. It includes product and process definitions, engineering synthesis, and optimization. The system uses a database on materials and manufacturing processes to analyze designs. The research presents a three-tier approach for integrated product and process development. The study also introduces a cost estimation methodology and a way to integrate manufacturing cost assessment into the design process. A prototype model called TASPI is described, along with an example problem evaluating different wing spar design concepts.