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.

When testing the user experience of a new tech product, making the experience as true to “real life” usage for testers as possible is an important part of getting genuinely insightful feedback.

Ryan Gray is Co-Founder and CEO of SGW Designworks, a product engineering and design firm featured in The Lean Startup. It’s very common for a prospective client to come to our product development ...