5 What is object model ?

The objects model describes the structures of objects in a system their identity, their relationship to other objects, their attributes, and their operations. The objects model provides the essential homework into which the dynamic and functional model cal placed. Our goal in constructing an object model is to capture those concepts from the real world that are important to an application. In modeling an engineering problem , the object model should contain terms familiar to engineers modeling a business problem. The object model is represented graphically with objects diagram containing object classes. Classes are arrange into hierarchies sharing common structure and behavior and are associated with other classes. Classes define the attributes values carried by each object instances and the operation which each object performs or undergoes.