What is one of the first steps you must do before creating a product prototype?

• A. Launch a marketing campaign
• B. Pre-sale the product for funding
• C. Create a social media following
• D. Identify materials

Answer: (D)

Knowing which materials to use is essential early in product development because the material directly shapes what the prototype can be and how it will be made. Material properties—strength, rigidity, weight, durability, heat resistance, and flexibility—along with cost and availability, influence design decisions, tolerances, and the manufacturing method you’ll use for prototyping (such as 3D printing, CNC milling, or fabrication). Identifying materials upfront helps you select feasible concepts, estimate expenses, and ensure you can actually source what you need, reducing the risk of redesigns later. Marketing campaigns, pre-sales, and building a social media following are valuable for market validation and funding, but they focus on launching the product rather than whether the prototype can be constructed given material constraints.