<<< Experimentation     Index     Example 2: Designing the objects for Automatic Banking Machine >>>

41. CRC Cards Example

  • CRC-cards describing the responsibilities and collaborations of Smalltalk's Model, View and Controller.

  • View and Controller are overlapping, implying close collaboration.

  • View and Controller are placed above the Model, since the Model does not initiate any collaborations.

  • Arrangement of cards often reflects how abstract concepts bubble up to the top of the design.

    CRC card
<<< Experimentation     Index     Example 2: Designing the objects for Automatic Banking Machine >>>