Abstract
The present paper aims to develop a multi-project planning system consisted in the hibread system of the project schedule optimization model and the regional economic simulation model. Moreover, the algorithm for the optimization of the project schedule is developed. The system is applied to the empirical case study on Maibara City Master Plan and analyze the relation between the project schedule and the impact of the project to the regional economy. From the computation results, the relation between the optimal project schedule and the population growth can be understood.