Parallel and Cooperative Particle Swarm Optimizer for Multimodal Problems

Table 1

Best combination levels of Sphere function by using OED method.

				Function value
	2	0	1
	2	−2	0
	3	0	0
	3	−2	1
Levels	Factor analysis
	= ()/2 = 6.5	= ()/2 = 7	= ()/2 = 9.5
	= ()/2 = 11.5	= ()/2 = 11	= ()/2 = 8.5
	() 2	() 0	() 0