You may want to examine these additional topics:
Collaboration diagrams—Another type of interaction diagram (like sequence diagrams) where the model elements are the center of focus instead of focusing on the message flows (as in sequence diagrams).
Generalization association—An association that indicates that one thing is a “type of” another thing (e.g., a truck is a type of vehicle). How might this be used with business actors?
How might each of your business model diagrams be affected if a corporate business goal was for your business to be the low-cost supplier versus being the top service provider?
You can find many of the concepts in this chapter (e.g., business use case model, business analysis model) further elaborated upon in the Rational Unified Process. [RUP2]