The thesis is comprised of topics dealing with variations of the pickup and delivery problem (PDP), a subfield of commercial transportation problems. The research on PDPs has been advanced thematically and methodologically by studying new topics and developing extensions of existing algorithms...

In distribution systems such as airlines and express package delivery, the use of hub-and-spoke networks is common, and flow consolidation at hub facilities is essential for cost reduction. While a constant discount factor is typically used to model cost reduction in interhub links, this paper...

(...) Das Traveling-Salesman-Problem (TSP; synonym Handlungsreisenden- oder Rundreiseproblem) ist eine der populärsten kombinatorischen Problemstellungen der letzten vier Jahrzehnte. In seiner illustrativsten Formulierung unterstellt es einen Handlungsreisenden, welcher durch eine geeignete...

In this paper we propose an ACO algorithm to optimize the total costs associated with the pickup and delivery of full truckloads under time window constraints in a hub network.(...)

Intermodal rail/road freight transport constitutes an alternative to long-haul road transport for the distribution of large volumes of goods. The paper introduces the intermodal transportation problem for the tactical planning of mode and service selection. In rail mode, shippers either book...

Nowadays, organizations have to compete with different competitors in regional, national and international levels, so they have to improve their competition capabilities to survive against competitors. Undertaking activities on a global scale requires a proper distribution system which could...

The routing of commodities is a tactical problem in supply chain management that aims to synchronise transportation services connecting a network of warehouses and consolidation locations. This paper considers the routing of commodities in a transportation network that is flexible in response to...