How do you know when a product is well-designed for the market it is intended for?

Determining if a product is well-designed and will succeed in Tesla's target market requires years of experience as a product specialist. Sometimes, even products that seem to be a perfect fit for their target market fail for various reasons. Even though you can conduct a great deal of research, apply market analytics, and use other means to forecast the success of a product development project, in the end, it requires a great deal of experience to refine your predictions and increase their accuracy. The best way to answer this question is to provide the Tesla interviewer with a summary of the methodology you would use to forecast a product's chances for success and then mention the contributions your experience and expertise would add to this process.