Lesson 2: The Iterative Design Process

Key Idea

Engineering is rarely a straight line; it is a cycle. The iterative design process involves repeated rounds of planning, building, testing, and analyzing.

Instead of risking actual supplies immediately, physical models are used for testing. These models simulate the behavior of the real pod, allowing for data collection and observation in a controlled environment. Analyzing failures in these early tests provides the critical data needed to improve the next version.

Key Idea

After testing, the focus shifts to optimization—the process of making the design as effective as possible based on the criteria.

Data analysis reveals which variables (e.g., parachute size, foam thickness) contributed to success. Optimization often requires making trade-offs. For example, adding more padding might improve cargo safety (meeting one criterion) but increase the cost and mass (conflicting with constraints). An optimal solution finds the best possible balance between these competing factors.