“…lower and upper bounds of parameters or variables) are favored for they provide some flexibility in decision making with their interval expressions (Huang et al, 1993b;Huang and Moore, 1993;Zheng and Lewis, 1993). Grey mathematical programming is a unique extension of LP-based models using a ''once through'' approach (Davila and Chang, 2005). Grey mathematical programming covers Grey Linear Programming (GLP) (Huang et al, 1992;Huang and Moore, 1993), Grey Integer Programming (GIP) (Huang et al, 1993a(Huang et al, , 1995, Grey Dynamic Programming (GDP) (Huang et al, 1994), Grey Nonlinear Programming (Chang and Wang, 1995) and Grey Fuzzy or Fuzzy Interval Programming (Chang et al, 1996a, b;Chang and Wang, 1997).…”