meeting -*- Outline -*-

* Finding Primary Actors, Goals, and Use Cases (Larman, 6.9)

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  BASIC STEPS IN REQUIREMENTS ANALYSIS

- Choose system boundary.

- Identify the primary actors.

- For each, identify their user goals.
  (Highest that is an EBP-level goal.)

- 

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     ... Define these cases that satisfy the user goals.

** choose the system boundary
     Q: what is the system boundary for the POS system?

** identify the primary actors
     it's it's best to brainstorm to try to identify the primary
     actors and their goals, sometimes they reveal each other.

     actors can be computer systems also

     Q: who are the primary actors in the POS system?

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 CHECKLIST TO HELP FIND ACTORS AND GOALS

- who starts and stops the system?

- who does user and security management?

- is there a monitoring process
  that restarts the system if it fails?

- how are software updates handled?

- who does system administration?

- does the system do something
  in response to a time event?

- who evaluates system activity
  or performance?

- who evaluates logs?
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        think about each of these for the POS system

        suggestion: be suspicious if no primary actors are
        external computer systems

*** actor-goal list
    There can be a section in the vision artifact
    that lists the actors and their goals.

    Try to do that for the POS system,
        compare to EBP guidelines

    Actor       Goal
    ================
    Cashier     process sales
                process rentals
                handle returns
                cash in
                cash out
                ...

    Manager     start up
                ...

    Note that the actors and goals depend on the system boundary.
         For example, customers are not actors because they don't
         directly interact with the POS system.

*** event analysis
    this is another way to find the answers and their goals.

    The basic idea is to list the external events, and ask where they
    come from, and why.

    For example,

    external event          from actor  goal
    ================================================
    select synchronization  user        synchronize with
    partner                             remote computer

    Q: What would be some external events for the POS system?

       enter payment        cashier     process a sale

*** define use cases
    After the actors and their EBP-level goals have been identified,
    define when used case for each goal.

    Name the use case similar to the user goal, starting with a verb.

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             CRUD

CRUD = 

Common to collapse these goals
 into one use case: Manage <X>

e.g., Manage User
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      ... Create, Retrieve, Update, Delete