Hi Estart-up Dubai,

Please find detailed reply for your query, 

Reply : In Odoo Inventory, the operation types determine the type of inventory movement that is being performed. There are several operation types available in Odoo Inventory, and they work as follows:

1. Internal Transfer: This operation type is used to move inventory from one location to another within the same warehouse. For example, if you need to transfer inventory from one storage location to another, you would use the internal transfer operation type.

2. Receipts: This operation type is used to receive inventory into the warehouse. When a supplier delivers goods, you would use the receipts operation type to record the inventory's arrival.

3. Delivery Orders: This operation type is used to ship inventory out of the warehouse. When a customer places an order, you would use the delivery orders operation type to record the shipment of the inventory.

4. Internal Transfers with Delivery Orders: This operation type combines the internal transfer and delivery order operations. It is used to move inventory from one warehouse to another and simultaneously ship the inventory to a customer.

Regards,

Ksolves Team!