ABSTRACT

In this study, a multi-period contingent sourcing model for sustainable sourcing is developed to mitigate the ripple effect caused by supply disruption. In this model, the manufacturer's main supplier is a recycled materials supplier who is subject to random disruptions and whose materials have setup time uncertainty. His backup supplier is a virgin materials supplier who is reliable. We investigate how the manufacturer's attitude towards risk affects his absorptive-capacity decision making and his sourcing strategy, both of which have not been addressed in the related literature. Our analyses reveal that the manufacturer's decisions are strategic substitutes as cost-related parameters (except the product holding cost) vary when he is risk-neutral and can become strategic complements when he is averse to risk. Furthermore, the manufacturer can improve contingent sourcing performance by leveraging adaptive capacity through choosing the proper timing at which to switch to the backup supplier. Finally, the manufacturer's sourcing strategy is sensitive to attitude towards risk when the cost difference between virgin and recycled materials is within a specific range over which higher restorative capacity from the main supplier and lower setup time uncertainty with recycled materials are required to justify a more risk-averse manufacturer's adoption of contingent sourcing.

摘要

在这项研究中，开发了一种用于可持续采购的多期或有采购模型，以减轻供应中断引起的连锁反应。在该模型中，制造商的主要供应商是回收材料供应商，该供应商受到随机中断且其材料具有设置时间不确定性。他的后备供应商是一家可靠的原始材料供应商。我们调查了制造商对风险的态度如何影响他的吸收能力决策和他的采购策略，这两者都没有在相关文献中得到解决。我们的分析表明，制造商的决策是战略替代品，因为成本相关参数（产品持有成本除外）在风险中性时会发生变化，而在他厌恶风险时可以成为战略补充。此外，制造商可以通过选择适当的时间切换到备用供应商来利用适应性能力来提高临时采购绩效。最后，当原始材料和回收材料之间的成本差异在特定范围内时，制造商的采购策略对风险态度敏感，在此范围内，需要主要供应商提供更高的恢复能力和回收材料的较低设置时间不确定性来证明更大的风险是合理的- 反对制造商采用或有采购。