Table 6 Variation in decision variables for Problems 4, 8, and 12.

Parameters	% Variation	Value	Crisp model			Fuzzy model			Cloudy fuzzy model
Parameters	% Variation	Value	\({T}_{1}\)	\({T}_{2}\)	TC	\({T}_{1}\)	\({T}_{2}\)	TC	\({T}_{1}\)	\({T}_{2}\)	TC
T	−50%	50	42.7834	14.658	100,681	34.671	13.386	97,281	42.67	13.839	104,691
	−25%	75	50.356	16.563	115,554	48.553	15.105	115,487	45.378	15.836	120,791
	0	100	68.8102	17.4725	155,102	68.7985	17.48	160,301	61.015	18.305	163,527
	25%	125	91.675	18.476	181,458	89.128	7.682	190,286	64.7676	20.015	202,582
	50%	150	112.687	19.0383	190,678	110.63	18.28	201,748	68.352	20.782	237,582
r	−50%	0.005	68.8102	19.572	201,561	68.7985	19.247	211,341	61.005	20.371	210,893
	−25%	0.0075	68.8102	18.573	172,521	68.7985	17.453	167,349	61.046	19.823	185,942
	0	0.01	68.8102	17.4725	155,102	68.7985	17.48	160,301	61.015	18.305	163,527
	25%	0.0125	68.8102	16.9362	134,628	68.7985	16.125	140,682	61.792	17.176	144,731
	50%	0.015	68.8102	15.9351	118,812	68.7985	15.791	121,856	61.856	16.783	128,864
λ	−50%	0.75	76.563	17.4725	77,103	76.672	17.48	80,946	76.62	18.305	93,673
	−25%	1.125	72.057	17.4725	117,561	70.765	17.48	121,387	69.285	18.305	132,065
	0	1.5	68.8102	17.4725	155,102	68.7985	17.48	160,301	61.015	18.305	163,527
	25%	1.875	65.75	17.4725	186,534	62.745	17.48	193,934	61.006	18.305	190,784
	50%	2.25	63.671	17.4725	217,67	61.674	17.48	220,562	60.583	18.305	214,856
α	−50%	30	67.128	17.4725	112,562	64.452	17.48	113,748	60.657	18.305	117,645
	−25%	45	67.784	17.4725	140,142	65.056	17.48	142,783	60.845	18.305	145,487
	0	60	68.8102	17.4725	155,102	68.7985	17.48	160,301	61.015	18.305	163,527
	25%	75	71.067	17.4725	163,76	69.623	17.48	167,572	65.674	18.305	181,356
	50%	90	74.613	17.4725	173,177	73.934	17.48	180,934	65.658	18.305	205,955

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