Chapter 6 Use-Case

Guideline Write Black-Box Use Cases

Focus on "what" not "how"

Guideline: How to Find Use Cases

1. Choose the system boundary
   1. Software,hardware,person,organization
2. Identify the primary actors
3. Identify goals for each actor
4. Define use cases that satisfy goals

Three Tests to Find a Useful Use Case

1. The Boss Test
2. The EBP Test
3. The Size Test

EBP

elementary business processes

A task performed by one person at one time in one place in response to one business event, which adds measuabble business value and leaves the data in a consistent state

Use Case Diagram

Show Computer System Actors with an Alternative notation to human actors

UP artifacts

Chapter 8 Iteration1 - Basics

Goals

1. Define the first iteration in the elaboration phase
2. Describe key inception and elaboration phase

What happened in inception

1. a short step to elaboration
2. determined basic feasibility, risk, and scope, to decide if the project is worth more serious investigation

What happened on elaboration

1. The initial series of iterations
2. The core,risky software architecture is programmed and tested
3. The majority of requirements are discovered and stablized
4. The major risks are mitigated or retired