A Computational Study of Genetic Crossover Operators for Multi-Objective Vehicle Routing Problem with Soft Time Windows

The article describes an investigation of the effectiveness of genetic algorithms for multi-objective combinatorial optimization (MOCO) by presenting an application for the vehicle routing problem with soft time windows. The work is motivated by the question, if and how the problem structure influences the effectiveness of different configurations of the genetic algorithm. Computational results are presented for different classes of vehicle routing problems, varying in their coverage with time windows, time window size, distribution and number of customers. The results are compared with a simple, but effective local search approach for multi-objective combinatorial optimization problems

On the use of reference points for the biobjective Inventory Routing Problem

The article presents a study on the biobjective inventory routing problem. Contrary to most previous research, the problem is treated as a true multi-objective optimization problem, with the goal of identifying Pareto-optimal solutions. Due to the hardness of the problem at hand, a reference point based optimization approach is presented and implemented into an optimization and decision support system, which allows for the computation of a true subset of the optimal outcomes. Experimental investigation involving local search metaheuristics are conducted on benchmark data, and numerical results are reported and analyzed

The internet as a relationship marketing tool - some evidence from Irish companies

This article explores the strategies underlying the use of the internet as a marketing tool by Irish businesses. Three different approaches to internet Marketing are described: the ornamental, the informational and the relational. It is shown that, theoretically, the internet offers a unique opportunity for marketers to build up and maintain relationships with their clients. However, data collected through a mail survey and a content analysis of web sites reveal that currently the most frequent use of the internet by Irish companies still follows an ornamental or, at most, informational pattern. The authors discuss whether this discrepancy between internet potential and practice is due to the social basis of market relationships or whether it can be seen as evidence that the adaptation of a new marketing tool follows an incremental pattern