A Discrete Group Search Optimizer for Hybrid Flowshop Scheduling Problem with Random Breakdown

Table 1

Factors and levels for orthogonal experiment.

Factor	Level 1	Level 2	Level 3	Level 4	Level 5
PS(1)	10	20	30	40	50
P(2)	0.6	0.7	0.8	0.9	1
MR(3)	0.2	0.4	0.6	0.8	1
pr1(4)	2	3	4	5	6
pr2(5)	1	2	3	4	5
𝑑(6)	1	2	3	4	5