“…Furthermore, the meaning of compactness slightly differs from author to author, being, for instance, associated with: i) zones shapes as close as possible to circles, squares or rectangles (Lin and Kao, 2008;Gonzalez-Ramírez et al, 2011;Jarrah and Bard, 2012); ii) geographically or visually compact zones (Perrier et al, 2008;Lei et al, 2012); or iii) the proximity between the demand entities in the same zone (Poot et al, 2002;Muyldermans et al, 2003;Kim et al, 2006;Tang and Miller-Hooks, 2006;Ríos-Mercado and Fernández, 2009;Salazar-Aguilar et al, 2012;Assis et al, 2014).…”