Creating a Vehicle Rear Defogger System : Exercise 3 - Linking Use-Cases to Scenarios

Exercise 3 - Linking Use-Cases to Scenarios

In this exercise, you use use-cases to create possible scenarios utilizing elements properties.

1.
Select the Charts tab from the main Rational Statemate window.
Charts Tab
2.
Select the REAR_DEFOG_UCD diagram from within the Chart View (refer to the following figure). This provides a list all of the diagram elements associated within the diagram in the Element Matrix.
Element Matrix
3.
Select the use-case within the Use Case Diagram called 'DEFOG_REAR_WINDOW' and then select Edit > Properties.
Note:
Double-clicking on the item within the Element Matrix also opens the Properties window. Selecting a diagram within the chart view displays all elements within the diagram in the Element Matrix.
4.
Select the Description tab and enter the following text in the Use-Case Long Description field:

'The customer may request a change in state of the rear defog control system. Once the system has been activated, it shall automatically time out and turns itself off without any customer interaction. The timing function can be modified by vehicle speed and load management.'

5.
Select the Definition tab and then click the ellipse button to invoke the Scenario List, to create the mapping between the use-case and the scenario(s). The Scenario List is invoked by clicking at the bottom of the Properties form.
6.
Scenario List Mapping
7.
Select Save from the Properties window and then Exit.