Conclusion
Intéressant de voir avec toutes les adresses efarmz de la journée, et comparer 100% van (adresses vélo actuelles consolidées) avec van-vélo cargo
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On larger and more varied days, the ALNS solver barely improved on the rounds the dispatchers built by hand, when we expected a model to do much better. The fifth intervention switched the solver. The optimisation model, with its reloads across hubs, the weight carried uphill and the shift rules, states what a good plan is; the solver searches for one. We implemented the same model in PyVRP, a solver for vehicle routing problems6, holding everything else identical to measure what the search alone contributes.
Pas clair pour moi ce qui différencie ALNS de pyVRP
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Figure 15 Height against distance ridden, one panel per round, thickening where the rider is climbing and by how much is aboard, with each hub load marked by the weight it puts on the bike. The fleet, the hubs and the objective all change between the columns.
Intéressant d'analyser la pente (en %) et voir en réalité quel poids on peut porter en fonction de la pente, car partir chargé de VT risque d'être compliqué et d'endommager le matériel
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into the objective routes the riders a much easier day for the same time on the road and the same distance ridden.
- longévité du matériel
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A day of van deliveries
As-tu pris une journée au hasardn ou celle la plus représentative ?
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Hills. Riders feel the load on the climbs, dispatchers plan rounds around them, and a solver that minimises duration alone sends the trailers up loaded, as the mixed fleet showed.
Super intéressé d'intégrer cela à nos futures études !!
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Second iteration — infrastructure: micro-hubs closer to the deliveries
D'après nos résultats, il semblerait que Usquare ne soit pas rentable et fasse perdre de l'argent, est-ce que tu retrouves cela aussi ? A priori si on garde VT et Linthout on est plus rentables
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Figure 6 When the last delivery is made, over 5,000 draws of the two plans above. The trailered fleet finishes at 19:58 at the median, 2 minutes after its plan, and never after 21:00; the vans finish at 20:47, 45 minutes after plan, and their finish spreads over two hours between the tenth and ninetieth percentile against twenty-five minutes for the trailers.
A confirmer, mais il me semble qu'eFarmz peut commencer ses tournées beaucoup plus tot en van,
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14.28
Congestion included?
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4 vans
je me demande si ils utilisent effectivement 4 vans par jour chez eFarmz aujourd'hui
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The boxes shipped are fairly voluminous,
And some are very heavy, other very light
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Figure 3 Service time per stop — median 1:26, mean 2:37, longest 56 minutes — and by area of Brussels. Service times are timed as elapsed time between stops minus modelled travel.
Sur quelles données t'es-tu basé ? Intéressé d'en discuter :))
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The figure
Super graphique interactif !
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We chose this flow deliberately, as the hardest one we could find: barely profitable, isolated from Urbike's other work, the number of boxes per address unknown until the day, and 2 delivery windows a day — 15:00–18:00 and 18:00–21:00.
- expensive linehauls, + delay in delivery impacting Urbike's internal organisation
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and until recently it delivered them exclusively by van.
C'est un client de longue date (>4 ans)
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