Reliability Analysis of the Engineering Systems Using Intuitionistic Fuzzy Set Theory

Table 3

Defuzzified values of the reliability parameters.

Spread		Defuzzified values of parameters at
		Failure rate	Repair time	MTBF	ENOF	Reliability	Availability
±0%	Crisp	0.0007652	1.4806586	1308.3285	0.00076446	0.9923772	0.9988695
±15%	I	0.00078845	2.1162556	1387.3031	0.00078748	0.9921490	0.9980299
	II	0.00078836	2.1129933	1386.9562	0.00078738	0.9921499	0.9980344
	III	0.00078832	2.1114761	1386.7954	0.00078734	0.9921503	0.9980365
±25%	I	0.00082994	3.7328473	1545.0429	0.00082843	0.9917425	0.9956702
	II	0.00082968	3.7161699	1543.8254	0.00082817	0.9917449	0.9956992
	III	0.00082956	3.7083396	1543.2595	0.00082805	0.9917461	0.9957130
±50%	I	0.00102659	30.128487	2712.3958	0.00102094	0.9898218	0.9442947
	II	0.00102556	29.505969	2706.8065	0.00101995	0.9898318	0.9452983
	III	0.00102508	29.196251	2699.9013	0.00101949	0.9898364	0.9457843

I: membership function, II: nonmembership function, and III: FLT.