“…For the blocking constraint, few studies took into account the different criteria (Companys and Mateo, 2007;Ronconi, 2005;Moslehi and Khorasanian, 2013;Rippin, 1983;Dekhici and Belkadi, 2010). Other authors proposed an approximate methods (Ronconi, 2004;Armentano and Ronconi, 1999;Grabowski and Pempera, 2007;Wang et al, 2010;Companys et al, 2010;Chowdhury et al, 2013;Ribas et al, 2011). But few studies deal with the makespan criterion in the flowshop environment with blocking.…”