Abstract: A decision analysis model based on extension of rough sets is proposed for multi-attribute decision making problems with preference and incomplete information. Firstly,the concept of limited dominance relatio is presented Then,the rough approximations of knowledge are obtained based on limited dominance relation and decision rules of classification are acquired Compared with the extended dominance relations,the limited dominance relation takes into account the differences between different incomplete information. Finally,an example shows the feasibility and effectiveness of the proposed model.

Key words: multi-attribute decision making, incomplete information, rough sets, limited dominance relation