Soft set and Rough set approach in decision making with uncertainties

The first part of this paper gives a general view of Knowledge Discovery in Database. The information system contains redundant attributes which will not be useful for Knowledge Discovery and may sometimes be misleading. The tools -Rough Set and the Soft Set, deal with uncertainty of the information system in data mining. In the second part, the basic definitions in Rough and Soft Sets are included and in the last, a decision making problem is addressed. The problem is presented in tabular form containing the information. Then, Reduct-soft-set is defined by applying reduction of the knowledge representation system in Rough set theory. An algorithm is applied to select the object with optimal choice. It uses a small number of parameters to determine the optimal objects for the problem of making decisions.