**Defense Dynamics has been awarded a fixed price project to design and build a military cargo jet. The design team is looking at ways to increase the cargo capacity of the plane while keeping manufacturing costs and the fuel efficiency of the final product within specific limits. The engineers on this team have identified factors that affect capacity, costs, and fuel efficiency and have created a statistical model of how these factors impact each other. The outcome of this model is a design with the highest cargo capacity and fuel efficiency at the lowest cost possible. What type of mathematical model is this called?**

**A**. Outcome-based Hypothesis**B**. Basis Benchmarking**C**. Cost of Quality**D**. Design of Experiments