Projects need boundaries and a way to express those boundaries coherently; the project vision provides this functionality.
The actors and their roles need to be defined on the basis of information available about the application domain.
The events are the embryo of what the system must support. They form the nucleus of the system's requirements and will be satisfied by use-cases defined in Chapter 4.
Providing estimates too early damages credibility. Typically, more information is needed before workable release cycles (increments) and estimates can be provided.
In the next chapter we:
Review the concept of the use-case and its modeling components.
Assign events to use-cases.
Identify the primary, ...