stock-logistics-warehouse/stock_picking_product_interchangeable/readme/CONFIGURE.md

Open Inventory -> Configuration -> Operations types and select an Operation Type you would like to use interchangeable products in. NB: Only Operation Types of the Delivery type can use this feature.

Select Substitute Products mode:

• "If all available". Interchangeable products will be added products will be added only if it is possible to reserve all requested amount.
• "If any available". Interchangeable products will be added if there is at least a single one available.

Product Settings

In Product form open Interchangeable tab and add products that can be used as a substitute.

Important: if you are using product variants Interchangeable products must be defined for each variant separately.