Designing a Multistage Supply Chain in Cross-Stage Reverse Logistics Environments: Application of Particle Swarm Optimization Algorithms

Table 14

The second period transportation plan by PSOA_IWM.

From	To	Stage 1			Stage 2				Stage 3					Stage 4
		1.1	1.2	1.3	2.1	2.2	2.3	2.4	3.1	3.2	3.3	3.4	3.5	4.1	4.2	4.3	4.4	4.5	4.6
Stage 1	1.1				29	142	72	158
	1.2				120	43	150	24
	1.3				576	845	194	128
Stage 2	2.1	12	0	19					177	115	148	90	164
	2.2	9	6	8					189	139	51	183	421
	2.3	0	0	0					104	78	130	74	12
	2.4	0	0	0					136	30	15	91	37
Stage 3	3.1	1	2	1	3	1	0	0						67	95	130	69	126	95
	3.2	2	4	0	2	0	3	0						41	54	111	106	27	5
	3.3	0	0	1	0	1	0	0						11	2	74	73	81	95
	3.4	2	0	3	1	1	2	0						36	45	23	148	127	43
	3.5	2	1	5	0	1	1	5						162	165	131	24	92	25
Stage 4	4.1	2	0	2	0	4	0	0	0	1	1	0	2
	4.2	0	2	0	0	1	0	0	0	1	0	0	0
	4.3	2	0	0	0	0	0	2	0	0	0	1	1
	4.4	1	0	0	0	0	1	0	0	0	0	0	1
	4.5	0	3	0	1	2	0	0	2	1	0	0	0
	4.6	3	1	0	1	2	0	0	2	0	0	0	1
Demand														300	350	450	400	430	250

Bold data are the reverse transportation volumes.