Ship Waiting Time In A River Port With Priority
Servicing And Limited Anchorage Area
Author(s)
S. Jovanović, J. Olivella & Z. Radmilović
Abstract
Arrivals and loading/unloading operations of ships and barges in river ports are
frequently considered to be of a stochastic nature and are therefore convenient to
be modelled with queueing theory. In this paper, we considered a hypothetical
port in which ship arrivals are assumed to follow the Poisson distribution and
their servicing, that is, loading and/or unloading rates are assumed to have a
deterministic distribution with constant service rate. In addition to this, we
assumed that the vessels are served on a \“first come – first served” basis with
non-preemptive priorities and that the anchorage area is limited, being situated in
the restricted inland waterway. As usual in real-life situations, self-propelled
(motor) barges and motor ships are given the first class priority and towed or
pushed barges are given the second class priority. Due to waiting area
(anchorage) restrictions, arriving ships which find the anchorage full are not
allowed to join the system, regardless of the priority class they belong to. The
whole port system is designed as an M/D/c/N queueing system in Kendall’s
notation and approximate solutions were obtained with numerical examples
which are intended to be helpful to the port engineer or port planner in designing
the process in the best possible, time saving way.
Keywords: river port, queuing system, priority servicing, ship arrivals, limited
anchorage, ship waiting time.
1 Introduction
Real operations with inland ships are considered dependant on the transport
technologies or, more precisely, on the kind of ships and tows used on inland
Keywords
river port, queuing system, priority servicing, ship arrivals, limited
anchorage, ship waiting time.
Related Book
Other papers in this volume
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