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G-2023-28

Towards resilience: Primal large-scale re-optimization

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référence BibTeX

Perturbations are universal in supply chains, and their appearance is getting more frequent in the past few years. These perturbations affect industries and could significantly impact production, quality, cost/profitability, and consumer satisfaction. In large-scale contexts, companies rely on mathematical optimization. Still, these companies must remain resilient to perturbations. In such a case, re-optimization can support companies in achieving resilience by enabling them to adapt to changing circumstances and challenges in real-time. In this paper, we design a generic and scalable resilience re-optimization framework. We model perturbations, recovery decisions, and the resulting re-optimization problem to maximize resilience. We leverage the primal information through fixing, warm-start, valid inequalities, and machine learning. We conduct extensive computational experiments on a real-world large-scale problem highlighting that local optimization is enough to recover after perturbations and demonstrating the power of our proposed framework and solution methodology.

, 27 pages

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Transportation Research Part E: Logistics and Transportation Review, 192, No article: 103819, 2024 référence BibTeX