Homayoun Shaabani

• Shaabani, Homayoun; Hvattum, Lars Magnus; Laporte, Gilbert & Hoff, Arild (2024). Stability metrics for a maritime inventory routing problem under sailing time uncertainty. EURO Journal on Transportation and Logistics. ISSN 2192-4376. 13. doi: 10.1016/j.ejtl.2024.100146. Full text in Research Archive Show summary

  We study a multi-product maritime inventory routing problem (MIRP) with sailing time uncertainty. We explicitly consider the replanning that happens after uncertainty is revealed. The objective is to determine the stability of the adjusted plans after the occurrence of an uncertain event and to evaluate the effect of incorporating different stability metrics in the rescheduling process. Five stability metrics are introduced, and mathematical formulations of the MIRP incorporating each metric are presented. A reoptimization framework is then used to analyze the impact of each stability metric. Calculations are performed using 360 instances. The main result is that adjustments to the original plan occur at no additional cost almost 50% of the time. If decision makers want a more stable plan, they should accept a 5% cost deterioration, resulting in 20% more stable solutions.

• Shaabani, Homayoun; Hvattum, Lars Magnus; Laporte, Gilbert & Hoff, Arild (2023). A goal programming model for the stability analysis of a maritime inventory routing replanning problem. Maritime Transport Research. 5(December). doi: 10.1016/j.martra.2023.100101. Full text in Research Archive
• Shaabani, Homayoun; Hoff, Arild; Hvattum, Lars Magnus & Laporte, Gilbert (2023). A matheuristic for the multi-product maritime inventory routing problem. Computers & Operations Research. ISSN 0305-0548. 154(June), p. 1–19. doi: 10.1016/j.cor.2023.106214. Full text in Research Archive Show summary

  This paper considers a multi-product maritime inventory routing problem in which the routes of the vessels are determined while inventories in the ports must remain within given bounds. Since there is more than one product, each port can be a consumption port for one product and a production port for another product. We propose a matheuristic to deal with large-size instances with a planning horizon of 60 days. The first phase of the heuristic identifies a subset of the arcs in order to use them as input parameters for the second phase. In the second phase, a mathematical model is solved with the selected arcs fixed. These two phases are iterated until a stopping criterion is satisfied. The solutions produced by the matheuristic are compared with those obtained by CPLEX. Comparing the single-product version of the problem with the multi-product version revealed that instances with multiple products require significantly more run time compared with the single-product instances.

• Shaabani, Homayoun (2022). A literature review of the perishable inventory routing problem. The Asian Journal of Shipping and Logistics. ISSN 2092-5212. 38(3), p. 143–161. doi: 10.1016/j.ajsl.2022.05.002. Full text in Research Archive Show summary

  The inventory routing problem arises when inventory management and vehicle routing decisions are integrated instead of treated as separate problems. The technique of combining such decisions could lead to solutions that are better than merging the optimal solutions of the smaller subproblems. Hence, the problem is prominent and has been the focus of extensive research in recent years. When the products considered in such a problem are perishable, the importance is intensified; the current paper presents a literature review of the inventory routing problem for perishable products. This review classifies papers according to five attributes, namely, the number of products, the type of product (including the types of product perishability and types of perishable products), the type of demand, the number of objective functions, and the solution approach. A comprehensive analysis is performed based on these five attributes. Finally, based on 89 relevant reviewed papers, directions for future research on the perishable inventory routing problem are presented. Keywords: inventory routing, perishable products, literature review, vehicle routing, vendor-managed inventory

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• Shaabani, Homayoun (2026). Diversification in multi-period portfolio optimization. Full text in Research Archive
• Hoff, Arild; Shaabani, Homayoun; Hvattum, Lars Magnus & Laporte, Gilbert (2023). A matheuristic for the multi-product maritime inventory routing problem. Full text in Research Archive
• Shaabani, Homayoun (2022). A reoptimization framework for maritime inventory routing problem under sailing time uncertainty. Full text in Research Archive
• Shaabani, Homayoun; Hoff, Arild; Hvattum, Lars Magnus & Laporte, Gilbert (2021). A matheuristic algorithm for maritime inventory routing problem. Full text in Research Archive
• Shaabani, Homayoun (2019). An efficient population-based simulated annealing algorithm for the multi-product multi-retailer perishable inventory routing problem. Full text in Research Archive
• Shaabani, Homayoun (2023). Multi-product maritime inventory routing problems. Molde University College – Specialized University in Logistics. ISSN 9788279623526. Full text in Research Archive
• Shaabani, Homayoun; Hvattum, Lars Magnus; Laporte, Gilbert & Hoff, Arild (2023). Stability metrics for a maritime inventory routing problem under sailing time uncertainty. Høgskolen i Molde - Vitenskapelig høgskole i logistikk. ISSN 9788279623427. Full text in Research Archive

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