ABSTRACT
The conventional reliability of a system is defined as the probability that the system will perform a predefined operation under some specified condition for a fixed time period. Traditionally, system reliability evaluation is dependent on the probabilistic approach. But this approach is not always valid, since in reality a lot of times data related to the system information do not represent the realistic situation correctly due to uncertainties present in it. Therefore, in many cases, reliability assessment of the system becomes a very difficult task. Hence, to evaluate reliability of a system when available information is uncertain, then people apply the fuzzy approach. In this chapter, a procedure is introduced to construct the membership and the nonmembership functions of the fuzzy reliability function, by considering the failure rates as time-dependent CBFN. With the introduced approach, reliability of different systems is evaluated in the form of a triangular CBFN.
