Decision depends on knowledge. Rough set is a tool for processing indefinite, imprecise data, which deals with knowledge in terms of classification. Especially, it is very easy to integrate the theory with almost all other soft-computing methods such as neural networks. Integrated systems have the advantage over using a soft computing simply. Under this background, intelligent decision based on rough analysis forms the forefront part of decision science. At the same time, rough set is at us initial stage an...