Hi,

Two Types of Picking policy :

1. Ship Products as Soon as Possible, with Backorders

2. Ship all products at once

Configuring Picking Policies:

Within its Inventory Module platform, Odoo provides two Picking Policies that are activated through the "Settings" submenu in the "Configuration" menu. To enable the "Picking Policy," choose the "Operations" option and then "Ship products as soon as available, with back orders" or "Ship all products at once." You can find specifics about each policy's function in the options field, as shown below.

Ship Products as Soon as Possible, with Backorders


Customers who request larger quantities of products than what is currently in stock will benefit from the "Ship Products as Soon as Possible, with Backorders" setting policy. Customers can proceed with their orders by enabling this option and making sure the inventory supply is less than the specified quantity.


Ship all products at once

When a customer places an order for more products than what is currently in stock, the "Ship all products at once" option will hold up order processing until the stock is replenished.


For more details, refer to the blog:

https://www.cybrosys.com/blog/an-overview-of-the-importance-of-picking-policies-in-odoo-17

Hope it helps