During the vehicle routing process, many constraints in the inbound supply chain should be considered. Especially in practice, several constraints interrupt the application of the inbound supply chain operation. Regulation of stock, Limitation of unloading space, Delivery time limitation, Changes of production plan, Distance of vendors, Disproportionate order quantity, Break time. Among the aforementioned constraints, regulation of stock, unloading space constraint, delivery time limitation, distance of vendors, and break time are determined by the enterprise’s policy and management strategy, therefore, they can be predictable and fixed. On the other hand, disproportionate order quantity and changes of production plan make it difficult to manage inbound supply chain, because they increase the complexity of vehicles’ route and inventory levels. However, changes in production plans cannot be predicted since it suddenly occurs by unexpected events and an even allotment of all parts to all suppliers is impossible because of the suppliers’ capability and productivity, and difference in the required quantity for each product. Therefore, to control the inbound supply chain, the vehicle routing system should be able to consider all of the aforementioned constraints.