Tasks and Methods in Applied Artificial Intelligence: 11th International Conference on Industrial and Engineering Applications of Artificial Intellige - Paperbackby Angel P. Del Pobil (Editor), Jose Mira (Editor), Ali Moonis (Editor) This two volume set constitutes the refereed proceedings of the 11th International Conference on Industrial and Engineering Applications of Artificial Intelligence and Expert Systems, IEA AIE 98, held in Benicassim, Castellon, Spain, in June 1998. The two volumes present a total of 187 revised full papers selected from 291 submissions. In accordance with the conference, the books