Object-Oriented Design

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Developing Scenarios

• Develop scenarios of how the objects interact to see if you have identified the right objects, the right operations, and the right relationships.
• Develop common scenarios (this is how the thing should usually work).
• Remember to also develop uncommon scenarios, "weird cases," boundary conditions.

• Scenarios are similar to, but more informal than, design-based test cases.
• Developing scenarios will often cause you to recognize new design requirements. Remember that design is incremental and iterative!   (Grady Booch)