Application in mold quotation with the fuzzy set & rough set theory

Enterprises lie in very dynamic ,uncertain competitive environment with the application & development of information technology and the productivity on the increase . The traditional quotation methods of molds have gone out of date. This paper presents a new quotation method of molds combining fuzzy set theory with rough sets according to the constituents of mold price . Firstly, it has built a mathematic model rapidly estimating mold cost based on fuzzy similarity comparison in fuzzy set theory. Secondly, it introduces data mining & reduction to customer information data base by means of rough sets, and proposes the customer classification rules with a instance in details. Finally, it gives a quotation system architecture frame for molds combining fuzzy set theory with rough sets. The new quotation method of molds both rapidly & accurately estimates mold cost and gives rational profit ratio according to customers´ classification. In the quotation process it not only considers the cost factors of molds,but also judges enterprise´s profit ratio. Therefore this mold quotation is made scientifically and reliably for enterprises to win customers and make profits .