For a history see: KΓΆksalan, Wallenius and Zionts 2011.
Moore of Silver Spring, Maryland; a sister-in-law Shirley Cowan, and many devoted and loving nieces, nephews, and other relatives and friends.
Sorting refers to placing alternatives in a set of preference-ordered classes such as assigning credit-ratings to countries , and classifying refers to assigning alternatives to non-ordered sets such as diagnosing patients based on their symptoms.