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  • Data and their description that were used for the study of Van Drone Routing Problem with Multiple Delivery Points and Cooperation

    The file below contains all the data and their description that were used for the study of Van Drone Routing Problem with Multiple Delivery Points and Cooperation (VDRPMDPC) as they are described in the article entitled Dataset for the van-drone routing problem with multiple delivery drop points. 


    Post date: Friday, January 13, 2023 - 10:24
  • The Effect of Limited Resources in the Dynamic Vehicle Routing Problem with Mixed Backhauls

    Ninikas, G., Minis, I.

    Information 2020, vol. 11, Issue 9, 414, 2020

    Received: 26 June 2020/ Accepted: 21 August 2020/ Published: 27 August 2020


    In the dynamic vehicle routing problem with mixed backhauls (DVRPMB) both pick up orders and delivery orders, not related to each other, are served. The requests of the former arrive dynamically while the latter are known a priori. In this study, we focus on the case of limited fleet,which fulfills all delivery orders, but may not have enough capacity to serve all pick up orders within the available working horizon. The problem’s dynamic nature and the attention to customer service raise interesting considerations, especially related to the problem’s objectives. The problem is solved through periodic re-optimization, acknowledging the fact that this pseudo-dynamic approach may lead to some limitations. For the underlying (static) optimization problem we propose appropriate objective functions, which account for vehicle productivity and propose a branch-and-price (BP) approach to solve it to optimality. The results indicate how the performance of the various objectives is impacted by different re-optimization frequencies and policies in this practically relevant environment of dynamic demand served by a limited fleet. Specifically, extensive experimentation indicates that accounting for vehicle productivity within a typical periodic re-optimization solution framework may result to higher customer service under a range of operational settings, in comparison to conventional objectives.
    Keywords: dynamic vehicle routing; re-optimization; dynamic pickup-and-delivery; limited fleet in vehicle routing
    Post date: Tuesday, October 11, 2022 - 11:28
  • Warehousing and Distribution Network Design from a Third-Party Logistics (3PL) Company Perspective

    Karagiannis, G., Minis, I., Arampantzi, C. and Dikas, G.

    “Warehousing and distribution network design from a Third-Party Logistics (3PL) company perspective”, Proc. Of the 10th IFAC Conference on Manufacturing Modelling, Management and Control, Nantes, France, June 22-24, 2022.


    This paper deals with the problem of optimizing the logistics network of a Third-Party Logistics (3PL) company. The goal is to minimize the cost of storage and transport operations, in the case of multiple warehouses, multiple suppliers, multiple customers, multiple products and multiple types of transportation vehicles. A new Mixed Integer Linear Program (MILP) model is proposed for this interesting problem. The related decisions include selection of (a) the warehouse(s) to store each product, (b) the inventory level per product per warehouse, (c) the warehouse(s) to serve each customer and (d) the appropriate vehicles to transport the products from the suppliers to the warehouses, and from the latter to the final customers. The model was applied in case study of a 3PL company in Greece to optimize part of its supply chain that comprises three warehouses, 23 suppliers and 53 customers. The results obtained were very encouraging, since overall warehousing and distribution costs were lowered by 10.84% compared to the way the company operates currently.
    Keywords: Warehousing, Distribution, Location, Inventory, Transportation, Network design, Third-Party Logistics (3PL), Combinatorial Optimization 
    Post date: Wednesday, June 29, 2022 - 08:44
  • APPENDIX: A state of the art classification and review of parameters that affect the design, control, and operating strategies of order picking system
    Post date: Thursday, April 14, 2022 - 08:44
  • Πρόσκληση Εκδήλωσης Αρχικού Ενδιαφέροντος Υποψήφιου Διδάκτορα
    Το Τμήμα Μηχανικών Οικονομίας και Διοίκησης του Πανεπιστημίου Αιγαίου και συγκεκριμένα το Εργαστήριο Συστημάτων Σχεδιασμού Παραγωγής και Λειτουργιών του Τμήματος, προσκαλεί την εκδήλωση αρχικού ενδιαφέροντος για την κάλυψη μίας θέσης υποψήφιου διδάκτορα στην ακόλουθη ερευνητική περιοχή:
    Χρήση μη επανδρωμένων σκαφών (drones) σε διαδικασίες εφοδιαστικής (logistics)
    Post date: Monday, October 12, 2020 - 08:31