Journal of Information & Systems Management Shah Nazir, Muhammad Nazir, Humaira Khan 4 2 2014 http://www.dline.info/jism/fulltext/v4n2/3.pdf Different methodologies are used to design and model a system, which having the ability to rank and to choose the most suitable component. In this paper we present the comparisons of membership and reduced membership functions for ranking of component. A model of different fuzzy rules is designed for three membership functions (mf) and then reduced the rules by reducing the membership functions. The proposed methodology applies on ISO/IEC 9126 quality model. The model having important features including functionality, reliability, usability, efficiency, maintainability and portability.