Like structured design, the term object-oriented design (OOD) means different things to different people. For example, OOD has been used to imply such things as

The design of an inheritance (specialization) hierarchy of objects | The design of a library of reusable objects | The process of specifying and coding of an entire object-oriented application | The term nonformal is used to describe approaches to OOD that are not well defined, step-by-step, or repeatable, such as those that emphasize the design of individual objects, specialization (inheritance) hierarchies, and libraries of objects... | Abstract