Object oriented analysis and design ooad is a technical approach for analyzing and designing an application system or business by applying object oriented programming as well as using visual modeling throughout the software development process to guide stakeholder communication and product quality ooad in modern software engineering is typically conducted in an iterative and incremental . Object oriented o o analysis and design is an approach that is intended to facilitate the development of systems that must change rapidly in response to dynamic business environments chapter 10 helps you understand what object oriented systems analysis and design is how it differs from the structured approach of the sdlc and when it may be . Modern objectoriented systems analysis and design approaches should support at least three separated but interrelated architectural views of a system functional static and dynamic the functional or external view describes the system in terms of behavior of the system in terms of messages passed among objects and state changes withing an . Object oriented analysis ooa is the first technical activity performed as part of object oriented software engineering ooa introduces new concepts to investigate a problem it is based in a set of basic principles which are as follows shows a design pyramid for object oriented systems it is having the following four layers