The risks of a focus strategy include:

a$.$

Decisions by focused competitors to use their resources to serve a wider range of customers$$ needs.

b$.$

A competitor$$s ability to use its core competencies to $$out$-$focus$$ the focuser by serving a more broadly defined segment.

c$.$

Decisions by industry$-$wide competitors to use their resources to serve a wider range of customers$$ specialised needs than the focuser has been serving.

d$.$

A competitor$$s ability to use its core competencies to $$out$-$focus$$ the focuser by serving a more narrowly defined segment.