A Stackelberg Solution to a Two-Level Linear Fractional Programming Problem with Interval Coefficients in the Objective Functions (Penyelesaian Stackelberg bagi Masalah Pengaturcaraan Pecahan Linear Dua-Aras dengan Pekali Selang dalam Fungsi Objektif)

In this paper, two approaches were introduced to obtain Stackelberg solutions for two-level linear fractional programming problems with interval coefficients in the objective functions. The approaches were based on the Kth best method and the method for solving linear fractional programming problems with interval coefficients in the objective function. In the first approach, linear fractional programming with interval coefficients in the objective function and linear programming were utilized to obtain Stackelberg solution, but in the second approach only linear programming is used. Since a linear fractional programming with interval coefficients can be equivalently transformed into a linear programming, therefore both of approaches have same results. Numerical examples demonstrate the feasibility and effectiveness of the methods.