Availability issue of software quality is one of the well-known topics of research in software engineering. Assessment used to improve the quality of software systems. Object oriented property is mainly designed for principles of abstraction, encapsulation, and inheritance. This research paper focuses on effects of cohesion and abstraction on availability. The effect of our try out indicates that extensive apply of inheritance leads to models that are more difficult to modify. These results are

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... in procession with the conclusions drawn from previous experiments on cohesion and abstraction with availability.