PSO and GSA are stochastic methods, because every time you run them, they give you different result.

but fuzzy is deterministic methods, every time run this method you see a same result,

and the fuzzy method is interpretable, because of the rule base, against PSO and GSA that they cannot give you any explanation for result (Why)

sorry for my bad english

https://www.researchgate.net/publication/280244004_A_comparative_study_of_metaheuristic_optimization_approaches_for_directional_overcurrent_relays_coordination

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