Abstract:

The fortification resources allocation of supply systems aims at making rational protective strategies to reduce the system losses caused by external disruptions. For supply systems based on the p-median model, a typical  kind of fortification resources allocation approaches is to make protective strategies through building and solving a bilevel programming model. The bilevel programming has been proved to be strongly NP-hard, thus it is not easy for the typical approaches to solve the instances with a large scale efficiently. According to the analysis of the operation mechanism of supply chain networks, the critical process which brings difficulties to solving resources allocation problems is identified as the reassignment process. Based on the reassignment process, a hierarchical network framework is constructed. According to this framework, a new protective approach is proposed. Experimental results show that, comparing with traditional approaches, the new approach can make rational protective plans and the computational time is dramatically reduced.