Different Total Capacity Utilization: PNDDifferentTotalCapacityUtilization

This pickup and delivery (PND) example shows a truck whose depot has a total capacity that is shared by two load capacities with different limits. One good may only use a part of the truck (a special compartment); the other good may use the whole truck, including that compartment.

For the PND building blocks (NodeDepot, ResourceDepot, Load, LoadCapacity), see PND.md.

References

• Example source: PNDDifferentTotalCapacityUtilization.java
• Pickup and delivery documentation: ResourceDepot and LoadCapacity

Scenario

The truck transports two goods:

• pallets of DelicateFruit, which must be stored in a special compartment (temperature and humidity),
• pallets of GlassVials, which are well packed and can be stored in the normal part of the truck or in the compartment for the fruit.

The truck and its depot

The resource Truck has one working day, March 11, 2020, 08:00 to 20:00 (Europe/Berlin), a max working time of 10 hours and a max distance of 2800 km.

createResourceDepot() gives the truck a SimpleResourceDepot with a total capacity of 70 and two SimpleLoadCapacity entries:

IResourceDepot depot = new SimpleResourceDepot("truckDepot", 70);

ILoadCapacity delicateFruitLoadCapacity = new SimpleLoadCapacity("DelicateFruit", 30, 5);
ILoadCapacity glassVialCapacity = new SimpleLoadCapacity("GlassVials", 70, 10);

Both load capacities share the total capacity of 70 of the depot. So the space left for GlassVials depends on how much DelicateFruit is on the truck, and the reverse.

The customers

Two nodes, CustomerOne and CustomerTwo, both at 50.9333, 6.95, are open on March 11, 2020, 08:00 to 18:00 (Europe/Berlin), with a visit duration of 30 minutes. createNodeDepot(...) gives each of them a SimpleNodeDepot with two SimpleLoad entries:

ILoad deliverGoodLoad = new SimpleLoad("DelicateFruit", fruitRequest, true, true);
ILoad pickupGoodLoad = new SimpleLoad("GlassVials", glassRequest, false, true);

The third argument is the request flag (true: the node requests the good, false: the node supplies it). The fourth argument is the fuzzy flag; both loads are created with true.

Solver properties

setProperties() registers:

• JOptExitCondition.JOptGenerationCount = 1000
• JOpt.Algorithm.PreOptimization.SA.NumIterations = 1000
• JOptWeight.Capacity = 200, to give capacity planning a high weight

Execution flow

1. Set the license via ExampleLicenseHelper.setLicense(this);
2. setProperties(), addNodes(), addRes()
3. Start the run with startRunAsync() and subscribe to progress, error, warning and status events.
4. Wait for the result with resultFuture.get(2, TimeUnit.MINUTES) and print it.

What to look for in the result

The printed result contains the depot information of the truck and of the two customers. Check:

• that both customers receive their DelicateFruit (2 and 3, from the initial load of 5),
• that both customers hand over their GlassVials (10 each, on top of the initial load of 10),
• that the load of the truck never exceeds the total capacity of 70, and DelicateFruit never exceeds 30.

How to run

Run the main(String[] args) method of PNDDifferentTotalCapacityUtilization.