"In this paper, the authors approach a quality assessment tool which will achieve the quality parameter at the design level. Earlier, in every case, they check the quality after the completion of software means when software is coded and ready to use then they come to know that high quality software is achieved or not. The need of quality assessment in Object Oriented Software (OOS) is very essential. In earlier model, ISO9126 introduced a type of quality in use having four elements-effectiveness, productivity, safety and satisfaction. ISO9126 defines the quality parameters-functionality, reliability, usability, efficiency, maintainability, and portability."