Gerrit K. Janssens

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Editorial The Vehicle Routing Problem (VRP) is a key to efficient transportation management and supply-chain coordination. In broad terms, it deals with the optimal assignment of a set of transportation orders to a fleet of vehicles, and the sequencing of stops for each vehicle. The VRP has a large number of real-life applications and comes in many guises,(More)
This paper focuses on the automatic interaction detection (AID)-technique, which belongs to the class of decision tree data mining techniques. The AID-technique explains the variance of a dependent variable through an exhaustive and repeated search of all possible relations between the (binary) predictor variables and the dependent variable. This search(More)
— A performance model is developed and validated for a local area network (LAN) with a star topology. A collision-avoidance network access protocol, as implemented in Hubnet, is considered. The model is based on a single server queueing system with finite sources and with a single buffer. Packets arriving at a full buffer retry their access after a fixed(More)
A production line is studied with several machines in series. The machines are separated with finite buffers. They can break down and have to be repaired. Production is assumed to be continuous, i.e. no individual products can be identified. Analytical models for such a system are scarce. Analytical results for the throughput can be obtained only under very(More)
Congestion on roads leads to uncertainty in travel times, which is important in delivery of goods, especially in a business environment where high levels of customer service are expected. Delivery periods to customers might be constrained by time windows, which makes the scheduling and routing of vehicles from the supplier's side more difficult. Operations(More)
Despite the growing role of barge transportation in the hinterland access of major seaports in Northwestern Europe, service network design for intermodal barge transportation has received little research attention. In this paper, a decision support model for service network design in intermodal barge transportation is presented. The model determines optimal(More)
The drayage of containers in the service area of an intermodal barge terminal is modelled as a full truckload pickup and delivery problem with time windows (FT-PDPTW). Initial solutions are generated with an insertion heuristic and improved with three local search operators. In a post-optimization phase the three search operators are integrated in a(More)