due to the considerable growth in the worldwide container transportation, optimization of container terminal operations is becoming highly needed to rationalize the use of logistics resources. for this reason, we focus our study on the quay crane scheduling problem (qcsp), which is a core task of managing maritime container terminals. from this planning problem arise two decisions to be made: t...

In recent years, the application of Activity-Based Costing in Port industry has been deeply researched in theory and practice, but researchers only concentrate on the bulk and general cargo’s ABC in loading and unloading operations and there is little about the liquids and chemicals’. Based on the liquids and chemicals’ handling process and the particularity of their cost accounting, the paper ...

The paper presents a comparison of two metaheuristic approaches in solving a constrained transportation scheduling problem (i.e., transport of goods in an emergency situations). We compared Parameter-less Evolutionary Search and AntStigmergy Algorithm. The transportation scheduling/allocation problem is NP-hard, and is applicable to different real-life situations with high frequency of loading ...

This work presents a time–space network flow model for scheduling recurring bulk rail deliveries from suppliers to customers. The objective is to maximize demand satisfied while minimizing waiting times for loading and unloading the bulk commodity. The model uses a variety of information including customer demand, rail network characteristics, loading and unloading hours, and track and station ...

A solution to the problems of resource allocation and scheduling of loading and unloading operations in a container terminal is presented. The two problems are formulated and solved hierarchically. First, the solution of the resource allocation problem returns, over a number of work shifts, a set of quay cranes used to load and unload containers from the moored ships and the set of yard cranes ...

In this paper an hybrid model for scheduling crane movements is presented. Cranes sharing the same track are considered. Cranes can reach any location along the track performing loading or unloading operations. As cranes share the same track their movements are constrained to avoid over crossing; tasks deadlines and priorities are also considered. Scheduler output are the assignment of the task...

The paper deals with the scheduling of a robotic cell in which jobs are processed on two tandem machines. The job transportation between the machines is done by a transportation robot. The robotic cell has limitations on the intermediate space between the machines for storing the work-in-process. What complicates the scheduling problem is that the loading/unloading operation times are non-negli...

This work addresses the Quay Crane Scheduling Problem under availability constraints, whose main goal is to determine the work schedules of the quay cranes allocated to a container vessel in order to carry out its transhipment operations (loading and unloading operations). An Estimation of Distribution Algorithm with shaking procedure is proposed to solve it. The position of the tasks and the o...

Only an objective knowledge of safety and health at work reality on the harbor platform active participation all stakeholders (employers, unions, workers) can bring improvement in this activity. The prevention accidents by ensuring safe healthy working conditions maintaining Occupational Safety Health Management system are factors that continuously develop improve performance helping to activel...