Experienced entrepreneur 
Steven Blank , after he sold his next startup, wondered why 99% + startups go bankrupt. After devoting several years of his life to studying this phenomenon and comparing with his experience, he developed a methodology, which he called 
Customer Development . She is set forth in the book 
The Four Steps to the Epiphany . The main tenets of the methodology are to build the product iteratively, constantly checking the market as soon as possible. This book is a desktop one for most entrepreneurs in Silicon Valley, and knowledge of the methodology is a prerequisite for many investors to get a round of investments. Blank reads a course on this topic at 
Stanford University for the past 10 years (By the way, he confirmed his participation online at the 
Entrepreholic conference and personal at 
IDCEE ) 
While the book is being translated, you can listen to a seminar on “Customer development in a startup” from the holder of the rights to translate and publish the book The Four Steps to the Epiphany in Russian (will be released early summer) 
Denis Dovgopoli , which he reads as part of the incubator 
GrowthUP .
In the near future he will read seminars in 
Kharkov , 
Kiev and 
Lviv .