The concept is to create stock/ replenishment locations for Vendor A and vendor B and create replenishment rules at these locations for specific products.

1. Create locations Vendor A and Vendor B type Internal with replenishment enabled, maybe as child locations of Subcontracting (Inventory > Configuration > Locations)

2. Associate specific location to each vendor. Update the vendor's subcontractor location (Contacts > Sales & Purchase Tab > Inventory section - to view this you would need to enable developer mode)

3. Create product specific replenishment rule at these locations with route and trigger set to auto (Inventory > Operations > Replenishment)

e.g. -

a. Reorder RM at Vendor A location route would be 'dropship' with deliver to location as Vendor A subcontract location (Dropship from vendor to vendor A)

b. Reorder Dried Yam 1 at vendor b location route would be 'buy'

4. Ensure the routes configured to cover locations,

eg.

Resupply Subcontractor on order - Default is pull from WH/Stock to Subcontracting

ADD Pull from Vendor A stock location to vendor B stock location

Also, have the supply method take from stock; if unavailable trigger another route

Similarly Dropship; Resupply Subcontractor on order will have to be updated

5. Ensure the applicable routes are selected on the product or product category

eg.

DY1 would have Resupply subcontractor (Vendor A to vendor b location) and resupply subcontractor on order (to product DY 1 from RM)

RM - dropship (buy from vendor and deliver to subcontractor vendor A)

Item 1 - resupply subcontractor on order (to product Item 1 from DY1)

The above is illustration of the concept and not a specific solution to your post. Would suggest configuring and testing in a test instance before implementing.

The below posts have additional details to the concept and configuration again not the precise solution to your post.

https://www.odoo.com/forum/help-1/how-to-have-a-view-of-the-stock-i-sent-to-my-subcontractor-199225

https://www.odoo.com/forum/help-1/skipping-resupply-subcontractor-step-by-keeping-stock-in-subcontracting-location-237595

Hi,

Please refer to the link:

1. https://www.odoo.com/documentation/19.0/applications/inventory_and_mrp/manufacturing/subcontracting.html

Odoo’s official documentation on subcontracting workflows, configuration, BoM types, and how the routes work.

2. https://www.odoo.com/documentation/16.0/applications/inventory_and_mrp/manufacturing/management/subcontracting.html

Explains how raw materials are shipped to subcontractors, how Odoo consumes components, and how the receipt is processed.

3. https://www.odoo.com/documentation/19.0/applications/inventory_and_mrp/manufacturing/subcontracting/subcontracting_basic.html

This shows the simpler subcontracting flows and how they differ from more advanced ones.

Hope it helps