A business running more than one warehouse has stock spread across sites, and stock that may need to flow between them. Routes and rules govern that. This piece is about multi-warehouse routes and rules in Odoo.
The multi-warehouse situation
When a business runs more than one warehouse, several things become true. Stock exists at more than one site. The sites may relate to each other, one may resupply another, stock may need to move between them. And a need at one site, a customer order, a requirement, has to be met from somewhere, which may be that site's own stock or stock from another. Multi-warehouse routes and rules are how Odoo governs all of this, so a multi-site operation runs coherently rather than as a set of disconnected warehouses.
What routes and rules are
A route, in Odoo, is a defined path that stock follows, made up of rules. Rules are the individual pieces of logic that say how stock moves. In a multi-warehouse context, routes and rules govern how stock flows between the warehouses: how one warehouse is resupplied from another, how a need at one site is met from another. Routes and rules are, in effect, the configured logic of the multi-site stock flow.
Resupply between warehouses
A central part of multi-warehouse routes and rules is resupply: one warehouse being supplied from another. A business may have, for example, a main warehouse that supplies others, or sites that resupply each other. Odoo handles this through resupply routes: a warehouse can be set up to be resupplied from another, so that a need at the resupplied warehouse results in stock being moved to it from the supplying warehouse. Setting up these resupply relationships, which warehouse supplies which, is a key part of configuring a multi-warehouse operation, because it tells Odoo where a site's stock can come from.
How a need is met
With routes and rules set up, a need at a warehouse can be met coherently. When stock is needed at a site, the routes and rules govern how that need is satisfied, from the site's own replenishment, or from another warehouse via a resupply route. The routes and rules mean the business does not have to work out, by hand, for every need, where the stock should come from; the configured logic governs it. A multi-site operation with its routes and rules set up has its inter-warehouse stock flow handled by the system.
Setting it up to match the real structure
The practical key, as with all multi-warehouse configuration, is to set the routes and rules up to reflect the business's genuine multi-site structure: which warehouses there are, how they genuinely relate, which supplies which, how stock genuinely needs to flow between them. Routes and rules set up to match the real structure let Odoo govern the multi-site stock flow correctly. Set up to a wrong or simplified picture, they will not. The business should be clear about its genuine multi-warehouse structure and configure the routes and rules to match it.
The takeaway
Multi-warehouse routes and rules in Odoo govern how stock flows between a business's warehouses, so a multi-site operation runs coherently. Routes are defined stock paths made of rules, and in the multi-warehouse context they govern resupply between warehouses and how a need at one site is met. Resupply routes, set up to reflect which warehouse supplies which, are central. With routes and rules set up to match the genuine multi-site structure, Odoo governs the inter-warehouse stock flow rather than the business working it out by hand. For how we approach Odoo, see our ERP practice.