Title: A decision making model using soft set and rough set on fuzzy approximation spaces

Authors: T.K. Das; D.P. Acharjya

Addresses: School of Information Technology and Engineering, VIT University, Vellore 632014, India ' School of Computer Science and Engineering, VIT University, Vellore 632014, India

Abstract: In modern era of computing, there is a need of development in data analysis and decision making. Most of our tools are crisp, deterministic and precise in character. But general real life situations contains uncertainties. To handle such uncertainties many theories are developed such as fuzzy set, rough set, rough set on fuzzy approximation spaces etc. But all these theories have their own limitations. To overcome the limitations, the concept of soft set is introduced. But, soft set also fails if the attributes in the information system are almost identical rather exactly identical. In this paper, we propose a decision making model that consists of two processes such as preprocess and postprocess to mine decisions. In preprocess we use rough set on fuzzy approximation spaces to get the almost equivalence classes whereas in postprocess we use soft set techniques to obtain decisions. The proposed model is tested over an institutional dataset and the results show practical viability of the proposed research.

Keywords: soft sets; rough sets; almost indiscernibility; fuzzy tolerance relations; ordering rules; intelligent systems; decision making models; modelling; fuzzy approximation spaces; uncertainties.

DOI: 10.1504/IJISTA.2014.065172

International Journal of Intelligent Systems Technologies and Applications, 2014 Vol.13 No.3, pp.170 - 186

Received: 02 Nov 2013
Accepted: 05 May 2014
Published online: 15 Oct 2014 *

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