Abstract
An applicability of delphi method based on some fuzzy reasoning is introduced by drawing an example from classification of collected unknown specimens. In this study, four methods : 1) similar-prior comparison method, 2) fuzzy pattern distinction method, elimination method and 4) combination method of fuzzy pattern distinction and elimination were used to determine a resemblance order of a candidacy rock to a collected unknown specimen. It was shown that a collected unknown specimen was classified to the same rock name by either of these four methods, but the resemblance orders were different. Delphi method is used to process an ambiguous nature with various determination results. It was shown that rock names in the order of the candidacy from the four methods are same for the most part by using the delphi method.
