We propose three methods for obtaining solutions in fuzzy constraint n
etworks and study their application to the problem of ordering fuzzy n
umbers. The techniques proposed may be classified as defuzzification f
unctions which are applicable to any set of mutually dependent fuzzy n
umbers in which the dependence relationships are represented by means
of metric constraints We suggest the use of these techniques for order
ing linked variables in an efficient manner, and discuss their behavio
r regarding several quality criteria. The first application realm of t
hese techniques B temporal reasoning. (C) 1997 Elsevier Science Inc.