What is order routing?

Order routing is the rule set that assigns each order to a fulfillment location. Typical rules prefer the node nearest the customer with all lines in stock, fall back to splitting across nodes, and respect per-location capacity and cut-off times. The rule runs per order and commits stock as it goes.

Routing rules encode a cost trade-off. Optimizing purely for proximity produces split shipments; optimizing purely for single-parcel shipments sends packages further. Most brands cap splits and accept the freight.

More on Orders & Fulfillment, or browse every commerce operations answer.