Commitment of items to orders can be done based on the Item Commitment Transaction Ordering.
Go to Setup > Accounting > Preferences > Accounting Preferences > Order Management
Set Item Commitment Transaction Ordering as Order by Order Priority.
When the preference is set to this option, items are committed based on set customer priority regardless of transaction date or expected ship date. An Order Priority column appears on forms for work orders, sales orders, and transfer orders. NetSuite uses this field to calculate the order priority for allocation.
Set the Default Commit Option as “Do Not Commit” for work orders, sales orders, and transfer orders. When entering a transaction, you can change the setting from the default if required.
Set Perform Item Commitment After Transaction Entry as cleared.
When orders of high and low priority are created and committed, then the order with high priority is considered first for commitment.
We can commit the orders by Commit Orders page or Reallocate Items page.
When using Perform Item Commitment After Transaction Entry, set Perform Item Commitment After Transaction Entry checked.
Set the Default Commit Option as “Available Qty” for work orders, sales orders, and transfer orders. When entering a transaction, you can change the setting from the default if required.
When you use the Perform Item Commitment after Transaction Entry, when an order is created, commitment occurs for the existing available quantity for the orders on creation.
Currently, if items are not available, NetSuite automatically allocates items based on the set priority. The order with the highest priority will have items committed for fulfillment. When a new order is created for a high priority customer and commit set to Available Qty, the items are not committed by prioritizing this order by decommitting the already committed low priority orders.