The ever-evolving body of empirical results do confirmation on the theoretical perspective the validity of OOD metrics whose validity is determined by them demonstrating that  they measure what they purport to measure. Quite often OOD metrics have been used as indicators of both the internal and external behaviors in the software development process. Software metrics especially for Object Oriented Systems literature often describe complex models with the focus to help predict various properties of software products and processes by measuring other properties. Usually designers are met with challenges to work with these measures especially when and how to use them. The very process of collecting these measurements leads to a better organization of the software process and a better understanding of what designers do as long as they confine to measurements that are meaningful. To this end therefore, the initiation of these metrics during the initial software development process is important. This paper elicits an understanding of the OOD metrics used in OOS development.