Statistical comparison of the critical components of the Borg MOEA based on the 75% quantile of the hypervolume, generational distance, and -indicator metrics. +, =, and − indicate the full Borg MOEA's 75% quantile was superior, statistically indifferent from, or inferior to the competing variant, respectively. The enabled components in each variant are identified with letters (A) population-to-archive ratio triggered restarts with adaptive population sizing; (B) -progress; and (C) auto-adaptive multioperator recombination.