Hi,

In Odoo 19, you can assign multiple lots/serial numbers to a single manufacturing order (MO). To do this, create the MO, check component availability, and then click "Produce" to access the production recording interface. For each component tracked by lots/serial numbers, you can select multiple lots/serial numbers from a dropdown, and Odoo will adjust the consumed quantity accordingly.

This process ensures traceability and updates inventory levels automatically. Ensure your products are configured to use lots/serial numbers under the Inventory tab by setting the Tracking field. If needed, you can enable "Allow Negative Stock" for consuming unavailable lots, but use it cautiously.

For more information:

* https://www.youtube.com/watch?v=5RKsZvug5AE

* https://www.cybrosys.com/blog/how-to-tracking-components-and-finished-products-with-lot-serial-numbers-in-odoo-17-manufacturing

Hope it helps