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). Proponents contend that the models should be continuously refined and evolved, in an iterative process, driven by key factors like risk and business value.