Working on a new product is always an exciting and risky process, even when you have all the data suggesting that the product is a win. In addition to all the administrative work, you need to know the ...

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.

Ryan Gray is co-founder and CEO of SGW Designworks, a full-service product development and engineering firm featured in The Lean Startup. When developing industrial and consumer products, my team ...