Object Oriented Analysis. A process of abstracting a problem by identifying the kinds of entities in the problem domain, the is-a relationships between the kinds (kinds are known as classes, is-a relationships as subtype/supertype, subclass/superclass, or less commonly, specialization/generalization), and the has-a relationships between the classes. Also identified for each class are its attributes (e.g. class Person has attribute Hair Color) and its conventional relationships to other classes(e.g. class Order has a relationship Customer to class Customer.)