Heuristics for Multiobjective Optimization of Two-Sided Assembly Line Systems

Table 1

Input data of P19 TALBP.

Task “𝑖”	Processing time “𝑡𝑖” (min)	Task direction “𝑘𝑖”	Code of task directions	Number of precedence “nop𝑖”	List of immediate precedence “𝑝𝑖”
1	2.8	L	1	0	—
2	3.1	R	2	0	—
3	2.5	E	3	1	1
4	3.4	R	2	2	1, 2
5	3.2	L	1	1	3
6	2.7	E	3	1	4
7	2.6	L	1	1	4
8	3.3	L	1	1	4
9	5.9	E	3	2	5, 6
10	3.7	R	2	2	6, 7
11	4.1	L	1	2	7, 8
12	2.2	E	3	2	9, 10
13	1.8	R	2	1	10
14	1.2	R	2	2	10, 11
15	2.3	E	3	1	12
16	2.4	L	1	2	12, 13
17	5.8	R	2	1	14
18	3.8	E	3	3	15, 16, 17
19	2.1	L	1	1	18