Viable Supply Chain Network Design by considering Blockchain Technology and Cryptocurrency

Table 9

Comparing three algorithms with the main model.

Problem	LP model lower bound (A)		LR model lower bound (B)		Main model (B)		Fix-and-opt. upper bound (C)		GAP1(%)	GAP2(%)
	Cost	Time (seconds)	Cost	Time (seconds)	Cost	Time (seconds)	Cost	Time (seconds)
P1	1603085.131	0.256	1917317.456	1.544	2839008.413	1.012	2841080.44	0.832	−32.47	0.07
P2	1621637.956	0.342	1938656.333	3.332	2868628.538	2.857	2869908.32	1.108	−30.17	0.04
P3	2696941.848	1.220	2794259.9	22.468	3931302.815	15.437	3941819.72	2.501	−28.92	0.27
P4	2726058.808	0.674	2748952.713	49.748	3813256.048	26.237	3826966.74	30.755	−27.91	0.36
P5	4186057.711	14.921	4479146.692	534.824	5525665.563	538.483	6119280.37	16.347	−18.94	10.74
P6	1.259045 E + 7	456.623	—	—	—	—	1.250087 E + 7	978.651	—	—
P7	2.5671 E + 7	2464.913	—	—	—	—	2.376011 E + 7	40152.25	—	—