Journal
OPERATIONS RESEARCH
Volume 66, Issue 4, Pages 1023-1039Publisher
INFORMS
DOI: 10.1287/opre.2017.1708
Keywords
multisourcing; disruption risk; supply chain networks
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This paper studies sourcing decisions of firms in a multitier supply cham when procurement is subject to disruption risk. We argue that features of the production process that are commonly encountered in practice (including differential production technologies and financial constraints) may result in the formation of inefficient supply chains, owing to the misalignment of the sourcing incentives of firms at different tiers. We provide a characterization of the conditions under which upstream suppliers adopt sourcing strategies that are suboptimal from the perspective of firms further downstream. Our analysis highlights that a focus on optimizing procurement decisions in each tier of the supply cham in isolation may not be sufficient for mitigating risks at an aggregate level. Rather, we argue that a holistic view of the entire supply network is necessary to properly assess and secure against disruptive events. Importantly, the misalignment we identify does not originate from cost or reliability asymmetries. Rather, firms' sourcing decisions are driven by the interplay of the firms' risk considerations with nonconvexities in the production process. This implies that bilateral contracts that could involve under-delivery penalties may be insufficient to align incentives.
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