THERE ARE NO alongside wharves for ocean-going vessels at Aden, so all cargo handling is done by tugs, lighters, launches and similar vessels. The conditions in which these craft work are quite severe and include shell encrustation, marine plant growth, and turbulent sea-water. Some craft operate both inshore and some miles out where they meet quite heavy seas. Maintenance work and costs are he…
In this paper a two-stage Data Envelopment Approach is used to assess the relative efficiency of container shipping agents operating at Spanish ports, and studying the factors influencing it. In the first stage, an input-oriented, Variable Returns to Scale (VRS) model is used to compute efficiency scores of the different shipping agents. The model considers labor as input, and numbers of loaded…
The purpose of this paper is to analyze the existence of differences in the implementation of environmental practices between companies that possess some form of certified environmental management system (ISO 14001 or EMS) and those that do not have any such system. This study also investigates whether companies with a certified EMS are also making additional environmental demands on their supp…
In spite of the wide experience already developed in the field of internal logistics using radio frequency, many companies are wary of its implantation due to the fact that the benefits of this technology are not easily quantifiable in most cases. Develops a detailed discounted payback analysis of the cash flows associated with the implementation of radio frequency, presenting a table with the …