A Hybrid Grey Based KOHONEN Model and Biogeography-Based Optimization for Project Portfolio Selection

Table 7

The main adjusted parameters in the investigated algorithms.

Biogeography-based optimization	Value	Firefly algorithm	Value	Artificial bee colony algorithm	Value	Shuffled frog leaping algorithm	Value
Number of habitats	100	Number of fireflies	100	Number of bees	100	Number of memeplexes	5
Emigration rates	0.7	Light absorption coefficient	1	Amount of food	Round (NB/2)	Number of frogs in each memeplex	10
Immigration rates	0.3	Attraction coefficient base value	2	Limit	20	Maximum of generation	100
Keep rate	0.2	Mutation coefficient	0.9	Maximum of iteration	100	Iterations within each memeplex	20