Product design begins with Problem Definition and Idea Creation. During these early phases, a team of designers will seek to better understand the issues facing users, then come up with solutions (some feasible and some not) that will solve the customers' needs within the constraints laid out by the company.

Next, the designers focus on Feasibility. This includes determining the cost of the product, the potential problems it might face, and how difficult it is to manufacture. A prototype is developed before the end of this stage.

Lastly, the prototype enters Testing. During this phase, the designers finalize the product through continuous improvements. Customers are brought in to test the product, more changes are made, and eventually, the product is ready for the market.