Abstract
In 2022, a new sea lock at IJmuiden is expected to open, permitting an increase in marine traffic of larger ships from the sea to the port. In the interest of facilitating operations, we evaluate the impact of the current first-come, first-served (FCFS) admittance policy in the context of berth allocation for a wet bulk terminal in the port. Four model types are constructed: optimal FCFS; no FCFS with fixed arrival times; 48-h arrival time relaxation; and complete arrival time relaxation. Comparison of the model types is done by means of a rolling time window: of each day within the time frame, a schedule was created for the following 2 weeks, after which the objective value was calculated. When comparing the average of all objective values, it was found that the optimal FCFS model already shows an improvement compared to the historical situation. Between the FCFS and the no FCFS model, there are no considerable differences, because the vessels are constrained to be scheduled on/after their arrival time at the port. When relaxation is allowed, a considerable efficiency gain is possible, especially if larger ships arrive at the port.
Highlights
In 2022, a new sea lock at IJmuiden is expected to open (Port of Amsterdam, 2018)
The spatial attribute describes the layout of the berths, which can be discrete (BAP-D: one boat can dock at a single berth at a time) (Brown et al, 1994), continuous (BAP-C: boats can moor at random places within the boundaries of the dock as long as they do not overlap with other vessels’ positions) (Lim, 1998), or hybrid
The temporal attribute concerns the arrival of the boats, and can be static (SBAP: vessels arrived already and can moor at any time as long as there is a berth available) (Imai et al, 1997), dynamic (DBAP: allows ships to arrive at individual and deterministic times, while work is in progress) (Imai et al, 2001), cyclic, or stochastic
Summary
In 2022, a new sea lock at IJmuiden is expected to open (Port of Amsterdam, 2018). Upon completion, this lock will have the title for being the world’s largest sea lock, permitting an increase in marine traffic of larger ships from the sea to the port. The temporal attribute concerns the arrival of the boats, and can be static (SBAP: vessels arrived already and can moor at any time as long as there is a berth available) (Imai et al, 1997), dynamic (DBAP: allows ships to arrive at individual and deterministic times, while work is in progress) (Imai et al, 2001), cyclic (vessels return to the berth repeatedly after a fixed time), or stochastic (arrival times are defined by stochastic parameters) When it comes to the handling time of the vessels there are five categories: fixed handling times, dependency on the berthing position, dependency on the number of cranes, dependency on the work schedules of the assigned cranes, and combinations of last three (Kovac, 2017). In terms of the complexity of BAP, heuristic methods are generally used (Clements et al, 1997; Lim et al, 2004; Smith and Pyle, 2004)
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