Page 111 - DCAP308_OBJECT_ORIENTED_ANALYSIS_AND_DESIGN

Unit 8: Advanced Interaction Modelling

Notes
And similarly, “Record Greeting” use case uses the discrete process - play greeting.
Our final list of use cases for Answering System will be:
Review Caller Messages
Answer Caller

Set Answer Mode
Record Greetings
Delete Caller Message
Play Greeting

Take Caller Message
If you are analyzing a sentence in English, the subject in the sentence can be identified as
a potential actor and the verb part of the sentence can be potential use case. Remember,
this may or may not apply to the problem in hand, but is a good starting point for use case
modeling.

Figure 1: The Use Case Diagram for the Answering System

A sample use case description is given in Table 1.

Table 1: Use Case Description for Use Case Answer Caller
Use Case ID #CRCEAS-UC1
Use Case Type Concrete
Use Case Name Answer Caller
Basic Course Actors: Caller
Preconditions: Answering machine is idle
Primary Path:
• The caller rings the phone line connected to the answering machine.

Contd...

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