Steve Blank seems to answer it the best http://steveblank.com/2012/03/29/nail-the-customer-development-manifesto/ http://steveblank.com/2012/03/29/nail-the-cust

Steve Blank seems to answer it the best http://steveblank.com/2012/03/29/nail-the-customer-development-manifesto/ http://steveblank.com/2012/03/29/nail-the-customer-developme...