Maintenance is a set of activities to keep the system operational after the installation of software. These activities include residual bug fixing, software modifications and software extensions. The ever growing need for productivity resulted in finding new techniques for designing software such that the development and maintenance expenses are brought down and productivity is improved. Object orientation is one such technique that evolved. This paper is a step towards observing, whether developing a system using anobject oriented design methodology is any beneficial over developing the same system using a functional approach during the maintenance phase of software development.

Maintenance, Object, Design, Softwaremetrics, Object-Orientated Design