Risk early warning of supply chain based on D-S evidence theory

Competition of the supply chain has been considered to be the main trend of business. However, the cooperation of supply chain between relevant organizations, because of information asymmetry, information distortion, market, political, economic, legal and other factors uncertainty, led to the existence of various risks. At the same time as the unique nature of the supply chain, damage resulting from risk of the supply chain is much more serious than on the individual enterprise. A small risk may causes supply chain radical chain reaction, causing destruction of the supply chain of the upstream and downstream enterprise as well as the entire supply chain damage and loss. In this paper, evidence theory is used to identify the belief function within the framework of the subset, belief function according to the maximum to determine the results of the comprehensive evaluation of the project, and an example to illustrate the practicality and effectiveness.