> For the complete documentation index, see [llms.txt](https://docs.xorosoft.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xorosoft.com/xoroerp-1/admin/what-is-an-order-linker.md).
# What is an Order Linker?
An Order Linker module is designed to streamline and enhance the efficiency of sales and purchase order processes. Occasionally, items on sales orders will be back-ordered or specially requested, and their stock won’t arrive for a few days. It would be convenient for a sales representative to **get an internal notification when an item for their customer has arrived and is ready to be shipped.**
This module links line(s) between a **purchase order and sales order** – and when the item has been received into the system, a notification automatically gets sent to the sales rep of the linked sales order.
Additionally, there's an app config, "**Auto allocate linked sales orders when stock is received"** that allows for the automatic allocation of linked sales orders when the inventory is received.
If this setting is on then the system will automatically allocate the sales order(s) linked to purchase order being received by creating pick waves. You can specify the wave allocation type i.e Full Orders only (which means the order will wait to allocate until the complete order is available in stock), Full Qty Lines only or Allocate what's available.
You can also **link a Manufacturing Order (Finished Goods/Raw Material) with a sales order.** This comes in handy when you are selling a manufacturable item. If there is a linking available, as soon as the item is produced, the representative can be notified about the inventory and you can then ship the order
{% hint style="info" %}
*Please note: The linking can only be created for orders of the same store and for orders that contain common items.*
{% endhint %}
### **Order linking can be created in multiple ways:**
#### Create a linking directly from the orders
To link the orders directly, open the order and go to Options > Link Orders.
#### Create a linking from the module
You can pull up the 'Order Linker' module, select the orders and add the linking.
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