A Study On Coordination Between Buyer And Vendor For Supply Chain Logistics Performance

The logistics performance is the main component of supply chain performance which has decisive influence upon supply chain competitiveness. The buyer-vendor coordination is the key mechanism of supply chain management, which can affect logistics performance. Thus, the problem of vender-buyer coordination for supply chain logistics performance is researched in this dissertation. The main contents could be summarized as follows.The quantization relationship between logistics capacity of supply chain node and level of customer service has constructed. In the case of constraint of due date of delivery, the maximum circulation quantity of node which has key influence upon the level of customer service is generally restricted to the capacity of bottleneck facility. A sequencing algorithm for both minimizing the number of late jobs and reducing tardiness quantity to the greatest extent is put forward. Finally, a method is extended to calculate the required capacity of bottleneck facility to achieve the perfect full rate of order.Based on constraint of transport capacity, the buyer-vendor coordination tactic is presented. Considering the freight cost of unit product is sensitive to order quantity and the manufacturer undertakes products transportation, the optimal lot size models in decentralized decision and centralized decision are presented. The analytical result shows that the more flexible the transport capacity is, the smaller the optimal production lot size is, which is consistent with short order lead time and small order quantity that claimed by the wholesaler. Then, the tactic of order lot size coordination based on other party in the supply chain for undertaking products transportation is put forward. Finally, the numerical analysis shows that under decentralized decision situation, when the transport capacity is more rigid, the quantity discount policy is superior to the tactic of replacing the manufacturer by the wholesaler to undertake products transportation. However, when the transport capacity is more flexible, the case is the opposition.Hockey-stick phenomenon prevails in supply chains and has many negative impacts on logistics and production operation of companies. Through statistic analysis of the data collected from the factory of an international notable food company which locates in mainland China, the effect of hockey-stick phenomenon on demand fluctuation and logistics performance of the factory is validated. A model is proposed to prove that the reason for the phenomenon is the price policy of volume discounts, which is popularly employed in industry. Then, the methods such as multiple products compounding pricing policy are proposed to mitigate the problem. Finally, our model and methods are validated by a case study.The coordination tactic of downstream logistics capacity expansion in supply chain is put forward. A mathematical framework is proposed to understand the interrelations among delivery time guarantee, pricing and order processing capacity of the retailer. The model and numerical analysis illustrate that the demand is higher and the retailer needs greater order processing capacity under the integrated decision situation than under the decentralized decision situation. The supplier could facilitate the retailer to add the order processing capacity and to achieve the best supply chain performance through reducing tranfer price, sharing in the investment cost of logistics capacity of the retailer or returning part profit increment of itself to the retailer.