“…ACO has been successfully applied to several combinatorial optimization problems, from the first travelling salesman problem applications (Dorigo et al, 1991), (Dorigo et al, 1996), to vehicle routing problems (Bullnheimer et al, 1999), (Reinmann et al, 2004), and to single machine and flow shop scheduling problems (den Besten et al, 2000), (Gagné et al, 2002) and (Ying & Liao, 2004). In this section we present a new hybrid ACO-SA approach to face the STWTSDS problem.…”