“…production of Table 2 Taxonomy of the existing research. Pre-treatment Selection of pre-treatment technology Cundiff and Grisso (2008), Eriksson and Björheden (1989) Timing and place of pretreatment De Mol et al (1997) Transportation Fleet management Eriksson and Björheden (1989) Vehicle planning & scheduling Ravula et al (2008aRavula et al ( , 2008b Outsourcing Tatsiopoulos and Tolis (2003) Storage Location of storage facilities Allen et al (1998), Cundiff et al (1997), Huisman et al (1997), Nilsson and Hansson (2001), Papadopoulos and Katsigiannis (2002), Rentizelas et al (2009b), Sokhansanj et al (2006), Tatsiopoulos and Tolis (2003) Selection of storage methods Cundiff and Grisso (2008), Cundiff and Marsh (1996), Eriksson and Björheden (1989), Fischer and Gaderer (2000), Gemtos and Tsiricoglou (1992), Huisman et al (2000), McGowin and Wiltsee (1996), Nurmi Kumar et al (2003), Nagel (2000), Nguyen and Prince (1996), Rentizelas et al (2009a), Tembo et al (2003) Aggregate production planning Cundiff et al (1997), De Mol et al (1997, Dornburg and Faaij (2001), Gallis (1996), Gemtos and Tsiricoglou (1999), Hansen et al (2002), Huisman et al (1997), Nilsson (1999a), Nilsson (1999b), Sokhansanj et al (20...…”