"Introduction to Modern Product Discovery"
The opportunity solutions tree (OST) is a construct that helps internal teams discover and create what is of real value, both to their customers and to their company, continously. It is clear, logical, and empirical. As such, it is quite similar, in many ways, to the lean start up approach to launching a new company. An example is in its appeal to organizations that attend carefully to metrics and experimentation
This 37' presentation on it, by its inventor, is just great. Though more than nine years old now, it appears almost prophetic, so steadily has the OST construct continued to gain momentum.
As a bit of evidence supporting this claim, here is a post on how the OST construct was helpful to a team responsible for product discovery. The post also includes some useful overviews of the opportunity solutions trees used in the initiative.