MULTI-OBJECTIVE OPTIMIZATION OF THE LOCATIONS AND SIZES OF FACILITIES BASED ON THE UTILITY OF USERS AND THE MAINTENANCE COST WITH PUBLIC TRANSPORTATION

This research formulates multi-objective optimization with two objectives: user utility and maintenance cost of facilities and public transportation. This formulation shows a trade-off between utility and cost, which leads to discussing the balance between the quantity of facilities for user utility and investment. This problem is solved with various parameters using NSGA-II, a heuristic approach to obtain the Pareto front. The results suggest that turning points at which the efficiency of investment changes exist and that they vary with parameters. This implies that the planner should make decisions based on the balance of the utility and the cost.