Multi Softset for Decision Making

Decision making is involved in all facets of our daily life. We use our intelligence, reasoning, analytical ability and available information for decision making. Most of the time the information available is not precise, giving rise to uncertainty in decision making. To deal with the uncertainty, the various mathematical tools like probability, fuzzy sets, rough sets, vague sets and soft sets etc are being widely used. But these tools are not completely capable to deal with all the types of uncertainty. In view of above a multi soft set approach is proposed in this paper to deal with uncertainty in decision making. A doubly soft set is proposed and illustrated with the help of suitable example. This multi soft set is illustrated to deal with uncertainty at two levels of hierarchy.