A Hybrid Approach to Solve a Model of Closed-Loop Supply Chain

Table 4

Levels of algorithm parameters.

	Parameter	1	2	3
Genetic algorithm	: crossover percentage	0.4	0.6	0.8
	: mutation percentage	0.1	0.2	0.3
	: number of GA iterations	50	100	150
	: population size	50	70	100
Firefly algorithm	: number of fireflies	100	150	200
	: light absorption coefficient	0.01	50	100
	: mutation coefficient	0.2	0.4	0.8
	: number of FF iterations	50	100	150