Abstract
In this paper, we discuss the problems which we meet in developing a practical multiobjective programming system using Goal Programming (GP) with a personal computer (PC). Firstly, about building up the GP model, we propose a two-step-modelling method, by which even PC-users can use the system easily. Then, we study the system's data structure, space problem (memory capacity) and time problem (computing speed). And we also propose the methods to solve or improve the problems. As a result, an applicable package was developed, by which the effectiveness of the methods can be checked.