The system repair times and the replenishment times of the spare parts inventory are also exponentially distributed.
Previous studies have indicated that, in cases of severe IVDD, with nearly complete loss of nerve system function, repair time can extend to 6 months [ 8], and in some cases recovery might not be possible [ 10].
end{aligned}Here, (tilde{P}{(lambda _1,lambda _2,ldots,lambda _n,tau _1,tau _2,ldots,tau _n)}) and (tilde{P}{(t/lambda _1,lambda _2,ldots,lambda _n,tau _1,tau _2,ldots,tau _n)}) are time-independent (system failure rate, repair time, and MTBF) and time-dependent (system reliability, availability, and ENOF) fuzzy reliability parameters, respectively.
Various reliability parameters such as system failure rate, repair time, MTBF, ENOF, availability, and reliability are calculated.
System (itext {th}) component repair time.
If the system fails during operation, it will be repaired with mean time μ 2. If the system fails after maintenance, mean repair time will be μ 1.
The expression of the various reliability parameters of the system is evaluated in terms of component's failure rate and repair time of the system using Tables 1 and 2.
Using Table 1, the expression for the system failure rate ((lambda _s)) and repair time ((tau _s)) takes the following forms: begin{aligned} lambda _s= & sum _{i=1}^{14}lambda _iend{aligned} (3) begin{aligned} tau _s= & frac{sum _{i=1}^{14}lambda _itau _i}{lambda _s}.
It was found that both the peak initial damage and the total life are very sensitive to the repair time, particularly when system load is high.
Yuan and Meng (2011) assumed the exponential distribution of working and repair time for a warm standby repairable system consisting of two dissimilar units and one repairman.
