Conventional reliability theory is based on the probability assumption and the binary-state assumption. However these two fundamental assumptions have been shown unacceptable in many cases and thus the possibility assumption and the fuzzy-state assumption may be taken. Consequently, fuzzy reliability theory is based on the probability assumption and the fuzzy-state assumption, or on the possibility asssumption and the binary-state assumption, or on the posssibility assumption and the fuzzy-state assumption....