Robustness of supply chain networks against underload cascading failures

被引:34
|
作者
Yang, Qihui [1 ]
Scoglio, Caterina M. [1 ]
Gruenbacher, Don M. [1 ]
机构
[1] Kansas State Univ, Dept Elect & Comp Engn, Manhattan, KS 66506 USA
基金
美国国家科学基金会;
关键词
Cascading failure; Robustness; Supply chain; Complex network; RESILIENCE; ALLOCATION; MODEL;
D O I
10.1016/j.physa.2020.125466
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In today's global economy, supply chain (SC) entities have become increasingly interconnected with demand and supply relationships due to the need for strategic outsourcing. Such interdependence among firms not only increases efficiency but also creates more vulnerabilities in the system. Natural and human-made disasters such as floods and transport accidents may halt operations and lead to economic losses. Due to the interdependence among firms, the adverse effects of any disruption can be amplified and spread throughout the systems. This paper aims at studying the robustness of SC networks against cascading failures. Considering the upper and lower bound load constraints, i.e., inventory and cost, we examine the fraction of failed entities under load decrease and load fluctuation scenarios. The simulation results obtained from synthetic networks and a European supply chain network (Cardoso et al., 2015) both confirm that the recovery strategies of surplus inventory and backup suppliers often adopted in actual SCs can enhance the system robustness, compared with the system without the recovery process. In addition, the system is relatively robust against load fluctuations but is more fragile to demand shocks. For the underload-driven model without the recovery process, we found an occurrence of a discontinuous phase transition. Differently from other systems studied under overload cascading failures, this system is more robust for power-law distributions than uniform distributions of the lower bound parameter for the studied scenarios. (C) 2020 Elsevier B.V. All rights reserved.
引用
收藏
页数:12
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