Parameter Interval Estimation of System Reliability for Repairable Multistate Series-Parallel System with Fuzzy Data

Table 1

Triangular fuzzy number of fuzzy failure rates and fuzzy repair rates (per year).

Subsystem 1
Fuzzy failure rate	Fuzzy repair rate
𝜆^112,1=(0.20,0.25,0.35)	𝜇^111,2=(0.015,0.020,0.025)
𝜆^122,1=(0.30,0.35,0.40)	𝜇^121,2=(0.010,0.015,0.020)
Subsystem 2
Fuzzy failure rate	Fuzzy repair rate
𝜆^212,1=(0.22,0.25,0.30)	𝜇^211,2=(0.025,0.030,0.035)
𝜆^222,1=(0.20,0.25,0.35)	𝜇^221,2=(0.022,0.025,0.030)
Subsystem 3
Fuzzy failure rate	Fuzzy repair rate
𝜆^132,1=(0.15,0.20,0.22)	𝜇^131,2=(0.012,0.015,0.022)
𝜆^232,1=(0.28,0.35,0.39)	𝜇^231,2=(0.018,0.020,0.025)