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    <journal-meta>
      <journal-id journal-id-type="nlm-ta">reapress</journal-id>
      <journal-id journal-id-type="publisher-id">null</journal-id>
      <journal-title>reapress</journal-title><issn pub-type="ppub"> 3042-2248</issn><issn pub-type="epub"> 3042-2248</issn><publisher>
      	<publisher-name>reapress</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">https://doi.org/10.48313/maa.v1i4.105</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Research Article</subject>
        </subj-group>
        <subj-group><subject>Supply chain resilience, Vehicle routing, Metaheuristic optimization, Disruption management, Adaptive large neighborhood search, Dynamic optimization, Logistics.</subject></subj-group>
      </article-categories>
      <title-group>
        <article-title>Dynamic Metaheuristic Optimization for Resilient Supply Chain Routing under Disruptions</article-title><subtitle>Dynamic Metaheuristic Optimization for Resilient Supply Chain Routing under Disruptions</subtitle></title-group>
      <contrib-group><contrib contrib-type="author">
	<name name-style="western">
	<surname>Suleiman</surname>
		<given-names>Ibrahim </given-names>
	</name>
	<aff>Department of Computer Science, Faculty of Physical Sciences, Ahmadu Bello University, Zaria, Nigeria.</aff>
	</contrib><contrib contrib-type="author">
	<name name-style="western">
	<surname> Lei</surname>
		<given-names>Zhang</given-names>
	</name>
	<aff>School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.</aff>
	</contrib></contrib-group>		
      <pub-date pub-type="ppub">
        <month>12</month>
        <year>2024</year>
      </pub-date>
      <pub-date pub-type="epub">
        <day>22</day>
        <month>12</month>
        <year>2024</year>
      </pub-date>
      <volume>1</volume>
      <issue>4</issue>
      <permissions>
        <copyright-statement>© 2024 reapress</copyright-statement>
        <copyright-year>2024</copyright-year>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/2.5/"><p>This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</p></license>
      </permissions>
      <related-article related-article-type="companion" vol="2" page="e235" id="RA1" ext-link-type="pmc">
			<article-title>Dynamic Metaheuristic Optimization for Resilient Supply Chain Routing under Disruptions</article-title>
      </related-article>
	  <abstract abstract-type="toc">
		<p>
			Modern supply chains face unprecedented vulnerability to disruptions arising from natural disasters, infrastructure failures, demand volatility, and geopolitical instability. The Dynamic Multi-Depot Vehicle Routing Problem with Disruptions (DMDVRP-D) captures the complexity of real-time logistics re-optimization when such events occur, yet existing solution approaches inadequately balance computational efficiency with solution resilience. This paper proposes the Dynamic Resilient Supply-chain Optimizer (DRSO), a novel hybrid metaheuristic that integrates Adaptive Large Neighborhood Search (ALNS) with Grey Wolf Optimizer (GWO) for solving the DMDVRP-D. DRSO introduces five key innovations: 1) scenario-tree-based stochastic programming embedded within fitness evaluation to account for disruption uncertainty, 2) ALNS destroy-repair operators specialized for supply chain resilience, including Facility Substitution (FS), Emergency Re-Routing (ER), Demand Splitting (DS), and Multi-Modal Switching (MS), 3) GWO-guided intensification on promising ALNS neighborhoods to accelerate convergence, 4) real-time re-optimization triggered by disruption events with warm-start from pre-disruption solutions, and 5) a Composite Resilience Score (CRS) metric that unifies Recovery Time (RT), Service Level (SL), and Excess Cost (EC) into a single evaluative measure. We formulate the DMDVRP-D as a Mixed-Integer Linear Program (MILP)  and evaluate DRSO on modified Solomon VRPTW benchmark instances extended with disruption scenarios, as well as two real-world case studies: a Nigerian pharmaceutical distribution network spanning the Lagos–Abuja–Kano corridor (45 nodes) and a Chinese manufacturing supply chain in the Yangtze River Delta (YRD) region (78 nodes). Computational experiments over 30 independent runs demonstrate that DRSO achieves 18–32% lower disruption recovery cost, 25–41% faster RT, and 15–28% fewer unserved customers compared to standalone ALNS, Genetic Algorithm (GA), Particle Swarm Optimization (PSO), and commercial solver (Gurobi with time limit). Statistical significance is confirmed via the Wilcoxon signed-rank test at p < 0.05. The results establish DRSO as a competitive and practical approach for resilient supply chain routing under dynamic disruption conditions.
		</p>
		</abstract>
    </article-meta>
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