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Introduction

Cost Model

Eco-Trips is built around a cost model of a container liner operation. It takes three elements as input:

  • vessels
  • terminals
  • cargo
Each physical process is reflected in terms of
  • monetary cost
  • duration
Each cost item is a function of the model's design variables. Design variables reflect decisions to be taken by the operator. They include e.g. vessel- and leg-specific speed or cargo to be loaded upon a vessel.
Example: The ship has a speed and draught dependant fuel consumption rate. When multiplied by voyage duration and fuel cost this yields the propulsion share of voyage cost per leg. Speed is a direct design variable, draught is a function of the payload mass and thus the cargo loaded upon the vessel.
You may think of Eco-Trips as a FEM software: you use a pre-processor to define the system parameters, you solve the job and visualize results using a post-processor.
To help you organize your work, load-line comes with a complete job-environment. Based on a roles & rights concept, it filters jobs by user, it lets you copy or update jobs, saves images and data with the job and provides a job-blog for coordination of work teams.
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Frequentyl Asked Questions

  1. Does the program optimize for maximum profit? No. Earnings per TEU are not accounted for. We assume that you maximize your profit by minimzing cost.
  2. What data are required to represent a ship? A couple of basic data must be provided as e.g. TEU capacity, deadweight tonnage, fuel consumption and speed at MCR. Eco-Trips generates characteristics from these data as appropriate. However, if you have measured or computed data sets e.g. for speed - draught - consumption rate these will be used.
  3. What data are required to represent a terminal? The key parameters are cost per move (loading, unloading, transshipment for laden/empty, TEU/FEU and GC/reefer container) and terminal productivity, i.e. moves per hour.
  4. What data are required to represent cargo? Cargo is being seperated into categories as
    • TEU / FEU
    • general cargo / reefer
    • empty / laden
  5. How are relations between terminals being found? Eco-Trips builds upon a set of geocoding information from ports, canals and standard relations. This is sufficient for many applications - it may require fine-tuning of build-in tracks for specific trades.

Nomenclature

We follow the nomenclature by

  • Maritime Economics: Martin Stopford, 3rd Edition, Routeledge 2009



date: 2011-12-18
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