xflp

xflp is a solver for truck loading problems in 3D with real world constraints

It supports:

• single or multiple bin packing
• rotating of items for 1 axis
• simulation of loading and unloading of items
• Constraints:
  • Max height of loading space
  • Max weight of loading space
  • Max bearing weight of each item
  • last in, first out condition
• consideration of stacking groups
• consideration of container types

Optimization:

• Contruction heuristic
• GRASP heuristic
  • Swap and relocate neighborhood search

Usage

XFLP xflp = new XFLP();
xflp.addContainer().setLength(13500).setWidth(2500).setHeight(3000).setMaxWeight(25000);
xflp.addItem().setExternID("Packet 1").setLength(13500).setWidth(2500).setHeight(3000).setWeight(25000);
xflp.addItem().setExternID("Packet 2").setLength(13500).setWidth(2500).setHeight(3000).setWeight(25000);
xflp.addItem().setExternID("Packet 3").setLength(13500).setWidth(2500).setHeight(3000).setWeight(25000);

xflp.executeLoadPlanning();

LPReport report = xflp.getReport();
int nbrOfUnloadedPackages = report.getSummary().getNbrOfUnLoadedPackages();

License

This software is released under [MIT License] (https://opensource.org/licenses/MIT)

Change log

0.3.2

• Added SpotBugs in build process to find smellies
• Fixed some smellies
  • In many cases a XFLPException is thrown instead of IllegalArgumentExceptions

0.3.1

• "Fast Fixed solver" uses new width proportion factor for choosing the next insert position

0.3.0

• Fix of stacking group feature
• Added a priorization criteria for choosing the next insert position. It takes the proportion of the item to the container into account.
• More reasonable structure of planning heuristics

0.2.0

• First stable release