An object in OOA represents a single typical but unspecified instance of something in the real world - any airplane, I don't care which one, as long as it is typical. The object-oriented analyst distinguishes this concept from that of a specified instance: Airplane number N2713A, Air Force One, or The Spirit of St. Louis, for example.

OOA - Object-Oriented Analysis - is based upon concepts that we first learned in kindergarten: objects and attributes, wholes and parts, classes and members.

OOA - Object-Oriented Analysis - is based upon concepts that we first learned in kindergarten: objects and attributes, wholes and parts, classes and members.

Object-oriented analysis is a method of analysis that examines requirements from the perspective of the classes and objects found in the vocabulary of the problem domain.

Objects are the real and conceptual things we find in the world around us. An object may be hardware, software, a concept (e.g., velocity), or even "flesh and blood." Objects are complete entities, i.e., they are not "simply information" or "simply information and actions." Software objects strive to capture as completely as possible the characteristics of the "real world" objects which they represent. Finally, objects are "black boxes," i.e., their internal implementations are hidden from the outside world, and all interactions with an object take place via a well-defined interface.

Object-oriented programming is a method of implementation in which programs are organized as cooperative collections of objects, each of which represents an instance of some class, and whose classes are all members of a hierarchy of classes united via inheritance relationships.

Object-oriented domain analysis seeks to identify reusable items localized around objects e.g., classes, instances, systems of interacting objects, and kits.

In object-oriented analysis, we seek to model the world by identifying the classes and objects that form the vocabulary of the problem domain, and in object-oriented design, we invent the abstractions and mechanisms that provide the behavior that this model requires.

[Object-oriented analysis is] the challenge of understanding the problem domain and then the system's responsibilities in that light.

Object-oriented design is a method of design encompassing the process of object-oriented decomposition and a notation for depicting both logical and physical as well as static and dynamic models of the system under design.

The idea of an object is the idea of its effects, of what it will do, and of what will happen to it, under various conditions.

Object-oriented methods tend to focus on the lowest-level building block: the class and its objects.

By an object, I mean anything that we can think, i.e. anything we can talk about.

The object-oriented paradigm is useful when building software systems where there is a hierarchy defined as a ranking or ordering of abstractions.