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Presuming you mean the VRP with time windows variant:<br>
Both VRP example variants follows their research spec (see docs for
link).<br>
The VRP with time windows spec indeed just counts the distance as
time in the score function,<br>
so given that the distance is specified in longitude/latitude, that
means a vehicle has a static speed (whatever that amounts to).<br>
<br>
The way most implementations deal with this (as well with other
real-world requirements),<br>
is to replace the connections from customer A to customer B<br>
with real GPS navigation times.<br>
See<br>
<a class="moz-txt-link-freetext" href="http://stackoverflow.com/questions/19410972/optaplanner-vrp-edge-weights-need-to-use-actual-gps-data-instead-of-euclidean-di">http://stackoverflow.com/questions/19410972/optaplanner-vrp-edge-weights-need-to-use-actual-gps-data-instead-of-euclidean-di</a><br>
<br>
Also note that you can customize the score function
(vehicleRoutingScoreRules.drl) to your business's needs.<br>
Depending on your business, you might want to favor time
optimization, fuel consumption optimization or a weighted score of
both.<br>
<br>
<div class="moz-cite-prefix">On 09-12-13 23:47, Suleyman Demirel
wrote:<br>
</div>
<blockquote
cite="mid:CAHOLoUXyeY_Fe38L6mUdmpMk_c03DEi_3dBNPBHUAzD51kSENg@mail.gmail.com"
type="cite">
<div dir="ltr">Hello everyone,
<div><br>
</div>
<div>I have just found out about optaplanner and have been
testing the vehicle routing problem on the examples provided.
I am not able to see how we can change the speed of a vehicle
using the data files provided. If my calculations are not
wrong, the current assumption looks like a vehicle's speed is
30 kmh (or miles per hour, whichever is assumed to be used).</div>
<div><br>
</div>
<div>Does anyone know how that can be modified? Thanks.<br
clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr"><br>
<div>Suleyman Demirel<br>
</div>
</div>
</div>
</div>
<br>
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