• Used for a system that can be modelled by interacting objects
• OOAD allows developers to work on different aspects of the same application at the same time
• Visual UML diagrams can be made to show both static structure and dynamic behavior of a system

Recap

• OOAD is the process of software planning based on behaviours of interacting objects
• Objects contain data, and they also have behaviours that prescribe the actions the object can take
• Classes are blueprints for objects
• A class diagram is a structural UML diagram that shows the relationship between objects