Το πρόβλημα διαχείρισης αποθεμάτων μέσω της ναυτιλίας
The maritime inventory routing problem
The increased volume of world seaborne shipments created the necessity of finding optimized transportation models of products. The first chapter of this thesis deals with the chronological evolution of these models, the main target of which is to coordinate inventory management and vehicle routing. Maritime inventory routing problems (MIRPs) are a special category of IRPs that take place in the marine environment. Next, the categories of the proposed solutions that will be presented in the second chapter are analyzed. Finally, the classes of solution approaches to inventory routing problems (IRP) based on heuristic and matheuristics methods are presented. In the second chapter, four different MIRP problems are introduced, their models are then defined and the solutions based on heuristic and matheuristic methods are presented. More specifically, we present a single product MIRP problem with multiple production and consumption ports, a multiple product MIRP problem with multiple production and consumption ports, a single product MIRP problem with multiple production and consumption ports, and a multiple product MIRP problem with multiple ports, which can be ports of consumption or production or both.