Which term refers to the process of building models to test design before production?

• A. CAD (Computer-Aided Design)
• B. Modelling
• C. Design for recycling
• D. Product life cycle

Answer: (B)

Modelling is the process of building models to test a design before production. By creating representations of the product—such as a physical prototype, a scale model, or a computer simulation—you can evaluate how it will work, how it fits with other parts, and how it can be manufactured, all before committing to full-scale production. This testing helps uncover design flaws, check performance, and refine features early, which saves time and costs later. CAD is a tool used to make digital versions of designs, but modelling covers the actual testing with models or simulations derived from those designs. The other terms refer to different aspects: CAD is about creating designs on a computer, Design for recycling focuses on end-of-life considerations, and Product life cycle covers all stages from concept to disposal.