Newest papers

Optimizing Flexibility and Commitments: Partially-Adaptive Multi-Stage Matrix Assembly Layout Design Problem

Baturhan Bayraktar, Merve Bodur, Martin Grunow, Rainer Kolisch · 2026 · arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.27401 · cited by 0 works (OpenAlex) · open-access PDF

French

Les modèles existants ne permettent que des révisions annuelles. Les calendriers d'assemblage de nœuds électriques fournissent une flexibilité de fabrication sous la variété des produits et la volatilité de la demande à travers des stations de production reconfigurables localement. La redéfinition périodique exploite cette flexibilité, mais les modèles existants ne permettent que des révisions annuelles. Les calendriers plus fins exposent un échange de flexibilité et d'engagement: la coordination des engagements de mise en page à l'avance, les accords de fournisseur et les rabais complémentaires. Nous introduisons le problème de révision de la mise en page, en choisissant conjointement les points de révision et les séquences de mise en page sous incertitude de la demande

Machine translation (Meta M2M100); the English original follows.

Abstract

Matrix assembly layouts provide manufacturing flexibility under product variety and demand volatility through locally reconfigurable production stations. Periodic redesign exploits this flexibility, yet existing models allow only annual revisions. Finer calendars expose a flexibility-commitment trade-off: advance layout commitments support coordination, supplier agreements, and discounts. We introduce the layout revision timing problem, jointly choosing revision points and committed layout sequences under demand uncertainty while production adapts within those layouts. We formulate it as a partially adaptive multistage stochastic program with two complementary extensions. Our cost-based extension places the economic value of advance commitment in the objective rather than prescribing revision budgets; our scenario-adaptive extension adapts revision timing to revealed information. For station-use minimization, we establish a cost decomposition across commitment intervals, yielding an exact dynamic program that reuses station subproblem solutions across model variants and parameter settings. As a more general alternative, we develop an integer L-shaped method strengthened by monotonicity-based cuts for budgeted formulations and enhanced cuts exploiting this decomposition. On automotive instances, including scenario trees with nearly 10,000 nodes, our combined model's average savings in expected station-use cost at the base-case discount reach 4.99% versus full adaptivity and 28.65% versus full commitment. Scenario adaptivity is most valuable when demand paths diverge and discounts justify commitment on some paths but not others, as in electrification-driven scenarios.

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Topics: Flexibility (engineering), Mathematical optimization, Computer science, Benders' decomposition, Production (economics), Exploit

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