“…These approaches include linear programming (Huang et al, 1992(Huang et al, , 1993Hsieh and Ho, 1993;Lund et al, 1994), mixed integer programming (Anderson, 1968;Mark et al, 1970;Fuertes et al, 1974;Helms and Clark, 1974;Walker et al, 1974;Kü hner and Harrington, 1975;Hasit and Warner, 1981;Jenkins, 1982;Gottinger, 1986;Kirca and Erkip, 1988;Zhu and ReVelle, 1990), non-linear programming , and dynamic programming (Baetz, 1990;Huang et al, 1994). Although the techniques of single-objective mathematical programming have long been used in analysing regional solid waste management issues, the inherent characteristics of environmental impacts, the rate of generation, the incorporation of recycling effects and the consideration of equity, generates additional complications that make the multi-objective and multipurpose modelling more attractive.…”