Which of the following is not a stage in the product development process?

• A. Ideation
• B. Prototyping
• C. Sourcing
• D. Marketing

Answer: (D)

The main idea here is which activities belong to creating the product itself versus preparing it for the market. Ideation is about generating ideas for the product, a clear early step in development. Prototyping involves building and testing a tangible version to confirm feasibility and usability. Sourcing is about securing the materials or components needed to actually produce the product, which fits into the development process as you plan and build.

Marketing, on the other hand, focuses on communicating value to customers, understanding market needs, pricing, promotion, and distribution. Those activities occur during commercialization and market readiness, not during the actual creation of the product. So marketing doesn’t fit as a stage in product development itself, making it the correct choice.