Lean startup validation: value & growth hypothesis

As an example of a failed idea where more validation could have helped, take Google Glass. It sounded like a good idea on paper, but the technology failed spectacularly. Customer research would have shown that $1,500 was too much money, that people were worried about health and safety, and most importantly… there was no apparent benefit to the product.

There are more to read here:
https://blog.urlaunched.com/lean-startup-validation-value-growth/