Two-stage Layout Optimization Model for Multi-level Pickup Point

To ensure the effective use of construction funds and realize the planning of pickup network for the target market, the phased construction of terminal distribution network under different targets was proposed with consideration of the cost constraints. By taking the level of pickup points and requirement type of customers into consideration, the second stage construction plan was designed based on the construction plan at first stage. The two-stage layout optimization model with maximum demand coverage and weighted satisfaction enhancement was thus established. The genetic algorithm was used to solve the optimization problem, which was verified by a case. Also, the influences of the budget allocation on the construction scheme was also analyzed. Results show that if the enterprise's cash flow capacity is limited, it should allocate the budget according to its own emphasis on the development target; if capable, it is recommended to invest as much as possible in the first stage.