A product prototype is the initial or simulated version of an item, created to test and validate ideas with stakeholders such as customers and users, which can be planned in a flowchart maker. In ...

Opinions expressed by Entrepreneur contributors are their own. Amazon Fire Phone, Google Glass, New Coke and Nintendo’s Virtual Boy: What do all these products have in common? They didn’t sell.

Acura announced a Type S variant of its new Integra last month, but the prototype was shown only in a few photos and a few laps around an oval in Japan. That changes this weekend, with that prototype ...