Rayzo

RAYZOFIELD NOTES ON CITY DELIVERY

One city.
More than one
way through.

Vehicles set out. The grid shifts. New orders arrive mid-route. Follow one study as its delivery map is rewritten around each change.

Enter the studyStart with a story

Zhou Leixishu · Logistics optimization & vehicle routing

City delivery research illustrationAn illustrated map of two depots, electric and fuel vehicles, a charging point, and changing customer orders.DEPOT ADEPOT BNEW ORDERROUTES IN MOTIONCITY DELIVERY · STUDY SKETCHEV ROUTEFUEL ROUTE
Study illustration · Routes and nodes are drawn for explanation, not solver output

ONE MAP, FOUR MOVING PARTS

The question is not just where to drive.
It is how to decide together.

Electric and fuel vehicles, charging time, multiple depots, changing orders: each looks like its own problem until the city makes them interact.

FOLLOW THE DAY AS IT UNFOLDS

From the first dispatch to the order that came late

Three stories · One delivery system
01

The grid changes

Cleaner charging can still shift the fleet in an unexpected direction.

02

The map changes

A new request can make yesterday's unfinished route worth rewriting.

03

The partnership changes

Two depots can share the work—but the savings need to travel too.

THE TURN / DYNAMIC DEMAND SIMULATION

Same seven vehicles. Replan—and all three measures fall.

In the same simulated event sequence, rolling reoptimization improved on sequential insertion in cost, emissions, and distance.

−7.05%cost−15.81%emissions−12.14%distance
Same initial plan · same event sequence · both online strategies used 7 vehiclesRead the full story →

CHOOSE YOUR ENTRY POINT

One map. Different ways in.

ADVISORS · REVIEWERSQuestion, method, and evidence boundariesStudy guide →LABMATES · PEERSFollow the turns that shaped the resultField notes →JUST PASSING THROUGHThree minutes on why a route map changesStart with one new order →

The illustration is a sketch. The numbers have sources. Every conclusion has a boundary.

About the author and these notes →