I am trying to model the multi-trip, multi-vehicle VRPTW using jsprit. I am aware that the tutorial: https://www.graphhopper.com/blog/2016/07/21/how-to-model-multiple-delivery-routes-with-a-single-vehicle/ provides an idea. It seems defining services as shipments might make the algorithm run slower. Is there anyway to model the problem differently (using jsprit)? My problem has hundreds of customers and 10-20 vehicles and hence I am afraid defining these many shipments might not be the best way. Please enlighten me. Thank you for your time.