Object-oriented analysis and design
Object-oriented analysis and design (OOAD) is an approach to analyzing and designing a computer-based system by applying an object-oriented mindset and using visual modeling throughout the software development process. It consists of object-oriented analysis (OOA) and object-oriented design (OOD) – each producing a model of the system via object-oriented modeling (OOM).
Source: Wikipedia — Object-oriented analysis and design (CC BY-SA 4.0)