How does an engineering notebook demonstrate iterative design?

• A. By recording changes, rationale, test results, and next steps after each iteration.
• B. By recording only final decisions.
• C. By detailing unrelated hobbies.
• D. By avoiding any changes.

Answer: (A)

Iterative design is shown when you capture the cycle of building, testing, learning, and updating. An engineering notebook demonstrates this by recording what changed, why that change was made (the reasoning), the results of the tests or experiments, and the next steps you plan after each iteration. This creates a clear, auditable trail of how the design evolved and why each adjustment was made, which is exactly what shows the iterative process in action. Recording only final decisions hides the thinking that led to them, while noting unrelated hobbies or avoiding changes misses the ongoing refinement that iterative design requires.