Each fuzzy technique has its own unique properties and the power to represent situations where the decisions cannot be clearly defined, as in the selection of an appropriate model. For the domain of the presentation, the fuzzy technique of belief functions proved to be robust, effective, and easy to manipulate. Another unique feature of fuzzy mathematics is that the aspects of fuzziness can be incorporated directly into other model management techniques. Fuzzy expert systems also hold promise as a technique for model management systems. Fuzzy logic can be a way to incorporate possibility concepts into logic driven systems.
Objects can contain fuzzy sets as well as crisp sets.
Author's Note A longer version of this paper including references is available from the second author.