“…Among the population-based methods proposed for DOPs we can find Evolutionary Algorithms [10,12,28,29,38], Particle Swarm Optimization [4,20,21,35], Ant Colony Optimization [23,24], Harmony Search [33], multi-agent metaheuristics [30,31] or Portfolio Algorithms [8] to cite but a few. However, in recent years, there is a growing literature showing that trajectory-based methods, coupled with appropriate diversity mechanisms, can also provide very competitive results [14,17,22,25].…”