How to balance the distance of vehicles?

[Kent Zhang]

Hello Everyone.

In the VRP example, I want to balance the distance between vehicles. That is, the distance of each vehicle is as equal as possible. How should this constraint be implemented? My constraint is as follows, but it doesn't work. Is it something I ignore? Thanks.

rule "Distance Balance"

when

        $vehicle : Vehicle()

        accumulate(

            Customer(

                getVehicle() == $vehicle,

                $toPreviousTrip : getDistanceFromPreviousStandstill());

            $totalTrip : sum($toPreviousTrip);

            $totalTrip > 0

        )

then

scoreHolder.addSoftConstraintMatch(kcontext, 1, - ($totalTrip * $totalTrip));

end

Thanks in advance!

[Lukas Petrovicky]

Kent,

this article should give you enough on that topic:
https://www.optaplanner.org/blog/2017/02/03/FormulaForMeasuringUnfairness.html

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Lukáš Petrovický

He/Him/His

Principal Software Engineer, Business Automation

Red Hat Czech, s. r. o.

lukas.pe...@redhat.com    IM: triceo/lpetrovi

[Kent Zhang]

Got it, thank you  Lukáš  , I will look into these methods.