Minimizing the number of restack movements in a container stack (NL.
Minimaliseren van het aantal verkasbewegingen in een container stack)
Report 2007.TEL.7172, Transport Engineering and Logistics.
The number of container transshipment moves is growing continuously, because
of the globalization. More container turnovers mean more handling equipment
(quantity) or better performing handling equipment (quality). In this case
the focus is on improving the software performance of an Automated Stacking
Crane by reducing restack movements with alternative (re)stack methods.
A simulation model is made to find an alternative a (re)stack method that
will reduce the amount of restack. The simulation model is programmed in an
object orientated program Delphi and an open source simulation software
TOMAS. Various simulation runs are done using different (re)stack methods
and in different situations.
Overall the (re)stack method Remaining Stack Capacity Improved (RSC Improved)
and Remaining Stack Capacity without time window (RSC no C) reduce the most
restack movements. If the containers with departure information (CDI) are lower
than 12%, the non CDI (re)stack methods: Random and Leveling will reduce more
restack movements. The (re)stack method Restack Chance reduces the most restack
movements when the stack's occupation rate is at its maximum (around 99%).
Reports on Transport Engineering and Logistics (in Dutch)
, TU Delft