Hi,

Please refer to the link:

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

Subcontracting in Odoo 19: This guide provides a comprehensive overview of setting up and managing subcontracting operations, including handling serial numbers during the receipt of subcontracted products.

2. https://www.odoo.com/documentation/19.0/applications/inventory_and_mrp/inventory/product_management/product_tracking/serial_numbers.html

Serial Numbers in Odoo 19: Learn how to enable and configure serial number tracking for products, and understand how serial numbers are assigned during various operations like receipts and manufacturing.

3. https://www.cybrosys.com/blog/how-to-setup-subcontracting-in-odoo-17-manufacturing

How to Setup Subcontracting in Odoo 17 Manufacturing: A blog post detailing the steps to set up subcontracting in Odoo 17, which can be beneficial for understanding the process in earlier versions like Odoo 19.

4.  https://www.cybrosys.com/blog/how-a-product-is-subcontracted-with-odoo-18

How a Product is Subcontracted with Odoo 18: An article explaining the subcontracting process in Odoo 18, offering insights that are applicable to Odoo 19 as well.

Hope it helps.