Strategic focus and the theory of business
The strategic focus is essentially the same as Drucker's theory of business:
Assumptions about the specific mission of the organization, what it considers meaningful results - its vision, mission, passion.
Assumptions about the environment of the organization, which define what an organization gets paid for - its value proposition.
Assumptions about the core competencies needed to accomplish the organization's mission - defines what the organization needs as a distinctive competency, what they can be the best in the world at doing.