This paper discusses the comparison between Traditional approaches and Object-Oriented approach. Traditional approach has a lot of models that deal with different types of projects such as waterfall, spiral, iterative and v-shaped, but all of them and other lack flexibility to deal with other kinds of projects like Object-Oriented. Object–oriented Software Engineering (OOSE) is an object modeling language and methodology. The approach of using object – oriented techniques for designing a system is referred to as object–oriented design. Object–oriented development approaches are best suited to projects that will imply systems using emerging object technologies to construct, manage, and assemble those objects into useful computer applications. Object oriented design is the continuation of object-oriented analysis, continuing to center the development focus on object modeling techniques.